subject:(Atmospheric correction)

University of Colorado

1. Wright, Logan Ansel. Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing.

Degree: PhD, 2018, University of Colorado

URL: https://scholar.colorado.edu/atoc_gradetds/82

► Hyperspectral instruments expand the spectral dimension of remote sensing measurements by collecting data in hundreds of contiguous wavelength channels. Spectrally resolved measurements can be… (more)

▼ Hyperspectral instruments expand the spectral dimension of remote sensing measurements by collecting data in hundreds of contiguous wavelength channels. Spectrally resolved measurements can be used to derive science products for a diverse range of fields such as atmospheric science, geology, oceanography, ecology, climate monitoring, and agricultural science, to name a few. The spectral information collected by hyperspectral instruments enables more accurate retrievals of physical properties and detection of temporal changes. These advantages have led to an increasing number of active and planned hyperspectral instruments. This thesis describes methods for attributing hyperspectral radiation observations to physical sources. We developed, validated and characterized improvements to a hyperspectral instrument, the Solar Spectral Irradiance Monitor (SSIM), built at the University of Colorado Boulder’s Laboratory for Atmospheric and Space Physics. Contributions include the characterization of the optics’ angular response, testing of an optics stabilizing platform and the development and testing of a spectrometer thermal control system. This instrument was then deployed on an aircraft for a field study with the National Ecological Observatory Network (NEON). SSIM measurements of upwelling and downwelling irradiance were used in conjunction with NEON’s Imaging Spectrometer to enable atmospheric correction of imagery collected below cloud layers. We developed a numerical spectral unmixing algorithm, Informed Non-Negative Matrix Factorization (INMF), to separate contributions to hyperspectral imagery from distinct physical sources such as surface reflectance, atmospheric absorption, molecular scattering, and aerosol scattering. INMF was tailored for hyperspectral applications by introducing algorithmic constraints based on the physics of radiative transfer. INMF was tested using imagery collected by the Hyperspectral Imager for the Coastal Ocean (HICO). To validate the method INMF results were compared to model-based atmospheric correction results. We demonstrate possible applications of INMF by presenting the retrieval of two physical properties, aerosol attributed radiance and seafloor depth. The retrievals were evaluated by comparing INMF output to independent retrievals of aerosol properties from the Moderate Resolution Imaging Spectroradiometer (MODIS) and in-situ seafloor depth measurements from the U.S. Coastal Relief Model. In these comparisons INMF shows promise for retrieving both physical properties, and may be improved with physics-based constraints on the seafloor and aerosol source spectra. Advisors/Committee Members: Peter Pilewskie, Konrad Sebastian. Schmidt, Thomas Kampe, Owen Brian. Toon, Xinzhao Chu.

Subjects/Keywords: atmospheric correction; hyperspectral; spectral unmixing; aerosol attributed radiance; seafloor depth; Atmospheric Sciences; Remote Sensing

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wright, L. A. (2018). Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/atoc_gradetds/82

Chicago Manual of Style (16^th Edition):

Wright, Logan Ansel. “Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing.” 2018. Doctoral Dissertation, University of Colorado. Accessed March 03, 2021. https://scholar.colorado.edu/atoc_gradetds/82.

MLA Handbook (7^th Edition):

Wright, Logan Ansel. “Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing.” 2018. Web. 03 Mar 2021.

Vancouver:

Wright LA. Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing. [Internet] [Doctoral dissertation]. University of Colorado; 2018. [cited 2021 Mar 03]. Available from: https://scholar.colorado.edu/atoc_gradetds/82.

Council of Science Editors:

Wright LA. Hyperspectral Observations for Atmospheric Remote Sensing: Instrumentation, Atmospheric Correction, and Spectral Unmixing. [Doctoral Dissertation]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/atoc_gradetds/82

Rochester Institute of Technology

2. Mericsko, Robert J. Enhancements to atmospheric-correction techniques for multiple thermal images.

Degree: Chester F. Carlson Center for Imaging Science (COS), 1992, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/3002

► Statistical estimation problems of atmospheric correction techniques for thermal infrared imagery have been studied. A revised multiple-view- angle atmospheric correction technique has been developed and… (more)

Subjects/Keywords: Atmospheric correction; Thermal imaging

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mericsko, R. J. (1992). Enhancements to atmospheric-correction techniques for multiple thermal images. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/3002

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mericsko, Robert J. “Enhancements to atmospheric-correction techniques for multiple thermal images.” 1992. Thesis, Rochester Institute of Technology. Accessed March 03, 2021. https://scholarworks.rit.edu/theses/3002.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mericsko, Robert J. “Enhancements to atmospheric-correction techniques for multiple thermal images.” 1992. Web. 03 Mar 2021.

Vancouver:

Mericsko RJ. Enhancements to atmospheric-correction techniques for multiple thermal images. [Internet] [Thesis]. Rochester Institute of Technology; 1992. [cited 2021 Mar 03]. Available from: https://scholarworks.rit.edu/theses/3002.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mericsko RJ. Enhancements to atmospheric-correction techniques for multiple thermal images. [Thesis]. Rochester Institute of Technology; 1992. Available from: https://scholarworks.rit.edu/theses/3002

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Surrey

3. Hadjimitsis, Diofantos Glafkou. The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs.

Degree: PhD, 1999, University of Surrey

URL: http://epubs.surrey.ac.uk/855312/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300296

► This thesis addresses the application of atmospheric correction algorithms in the satellite remote sensing of reservoirs. The major aims of the project were, first to… (more)

▼ This thesis addresses the application of atmospheric correction algorithms in the satellite remote sensing of reservoirs. The major aims of the project were, first to identify the problem of atmospheric effects on satellite images, second to review the available atmospheric correction methods, third to apply the image-based techniques and methods based on atmospheric modelling to time-series Landsat-5 TM images of large reservoirs in the Lower Thames Valley and, fourth, to evaluate the effectiveness of these methods in this application. The wide range of digital numbers observed in a time series of masked images of eutrophic reservoirs in the Lower Thames Valley demonstrated The important time-dependent contribution of atmospheric effects. Uncorrected at-satellite reflectance values for the waters in these reservoirs were found to be dominated by atmospheric effects, which accounted for between 63 % to 100 % of the at-satellite reflectance in the visible and near infrared bands. This confirms the importance of removing atmospheric effects from dark targets before attempting to correlate physical data with satellite measurements. Evaluation of the atmospheric correction techniques was achieved by comparing the atmospheric corrected reservoir reflectance data with the spectro-radiometric measurements acquired in-situ using a GER1500 field spectro-radiometer and with other reflectance values found in the literature. It was found that the darkest pixel method was the most suitable technique in the Landsat-5 Thematic Mapper (TM) bands 1, 2 and 3 for removing atmospheric effects from satellite images which include reseryoirs. The darkest pixel (DP) method is a fully image-based technique, and is simpler in adaptation and easier computationally than other more sophisticated atmospheric correction algorithms. Using data collected on the Lower Thames reservoirs, it has been shown that accounting for atmospheric effects in Landsat TM images enables the development of water quality predictive equations. The atmospherically corrected (using DP) satellite reflectance values were found to improve significantly the correlations with chlorophyll-a (chl-a) and particulate organic carbon (POC). The best correlations for predicting chl-a and POC were found in the TM 1 and TM 2 bands respectively. Concerning the use of eutrophic reservoirs as pseudo-invariant targets, it was found that (a) the low spectral reflectance values, (b) the negligible spatial variability within reservoirs, (c) their generally large size and distinctive shape and (d) their high turbidity make them suitable dark pseudo-invariant targets. Values of ground reflectance for eutrophic reservoirs are provided for the user to evaluate atmospheric effects in other studies. A new atmospheric correction method has been developed based on the use of a very bright object (concrete airport aprons) and a very dark target (eutrophic water storage reservoir). The new method has been applied to images of the Lower Thames Valley and sites in Greece and Cyprus. Two novel methods…

Subjects/Keywords: 519; Images; Atmospheric; Correction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hadjimitsis, D. G. (1999). The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs. (Doctoral Dissertation). University of Surrey. Retrieved from http://epubs.surrey.ac.uk/855312/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300296

Chicago Manual of Style (16^th Edition):

Hadjimitsis, Diofantos Glafkou. “The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs.” 1999. Doctoral Dissertation, University of Surrey. Accessed March 03, 2021. http://epubs.surrey.ac.uk/855312/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300296.

MLA Handbook (7^th Edition):

Hadjimitsis, Diofantos Glafkou. “The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs.” 1999. Web. 03 Mar 2021.

Vancouver:

Hadjimitsis DG. The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs. [Internet] [Doctoral dissertation]. University of Surrey; 1999. [cited 2021 Mar 03]. Available from: http://epubs.surrey.ac.uk/855312/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300296.

Council of Science Editors:

Hadjimitsis DG. The application of atmospheric correction algorithms in the satellite remote sensing of reservoirs. [Doctoral Dissertation]. University of Surrey; 1999. Available from: http://epubs.surrey.ac.uk/855312/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300296

University of the Western Cape

4. Seaton, Dylan St Leger. The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa.

Degree: 2019, University of the Western Cape

URL: http://hdl.handle.net/11394/7057

► The lack of monitoring of non-perennial rivers is a major problem for water resources management, despite their significance in satisfying agricultural, economic and recreational needs.… (more)

▼ The lack of monitoring of non-perennial rivers is a major problem for water resources management, despite their significance in satisfying agricultural, economic and recreational needs. Pools in non-perennial rivers are not monitored, due to their remoteness. Remote sensing offers a promising alternative for the monitoring of changes in water storage in these pools. This study aims to assess the extent to which remotely-sensed datasets can be used to monitor the spatio-temporal changes of water storage of pools along non-perennial rivers in the Western Cape. The objectives of this study are: (1) to determine a suitable image preprocessing and classification technique for detecting and monitoring surface water along nonperennial rivers, and (2) to describe the spatial and temporal changes of water availability of pools along non-perennial rivers, using remotely sensed datasets. The Normalised Difference Water Index (NDWI), Modified NDWI (MNDWI), Normalised Difference Vegetation Index (NDVI), Automated Water Extraction Index for shadowed (AWEIsh) and non-shadowed regions (AWEInsh) and the Multi-Band Water Index (MBWI) classification techniques were investigated in this study, using the Sentinel-2 and Landsat 8 datasets. In-situ measurements were used to validate the satellite-derived datasets, while the use of high resolution aerial photography and Digital-Globe WorldView imagery were further compared to the results. The results suggested that the NDWI is the most suitable classification technique for identifying water in pools along non-perennial rivers throughout the Western Cape. The NDWI applied to the Sentinel-2 Top-of-Atmosphere (TOA) reflectance dataset had the highest overall accuracy of 85%, when compared to the Sentinel-2 Dark Object Subtraction 1 (DOS1) atmospheric correction, Sentinel-2 Sen2Cor atmospheric correction, Landsat 8 TOA reflectance and Landsat 8 DOS1 atmospheric correction datasets. The incorporation of atmospheric correction was shown to eliminate surface water pixels in many of the smaller pools. Advisors/Committee Members: Mazvimavi, Dominic (advisor).

Subjects/Keywords: Atmospheric correction; Time series; Pools; Remote sensing; Multiband methods

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Seaton, D. S. L. (2019). The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa. (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/7057

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Seaton, Dylan St Leger. “The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa. ” 2019. Thesis, University of the Western Cape. Accessed March 03, 2021. http://hdl.handle.net/11394/7057.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Seaton, Dylan St Leger. “The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa. ” 2019. Web. 03 Mar 2021.

Vancouver:

Seaton DSL. The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa. [Internet] [Thesis]. University of the Western Cape; 2019. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/11394/7057.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Seaton DSL. The use of remote sensing data to monitor pools along non-perennial rivers in the Western Cape, South Africa. [Thesis]. University of the Western Cape; 2019. Available from: http://hdl.handle.net/11394/7057

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

5. CHANG CHEW WAI. Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance.

Degree: 2008, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/27649

Subjects/Keywords: Ocean Colour atmospheric correction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

WAI, C. C. (2008). Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/27649

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

WAI, CHANG CHEW. “Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance.” 2008. Thesis, National University of Singapore. Accessed March 03, 2021. http://scholarbank.nus.edu.sg/handle/10635/27649.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

WAI, CHANG CHEW. “Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance.” 2008. Web. 03 Mar 2021.

Vancouver:

WAI CC. Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance. [Internet] [Thesis]. National University of Singapore; 2008. [cited 2021 Mar 03]. Available from: http://scholarbank.nus.edu.sg/handle/10635/27649.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

WAI CC. Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance. [Thesis]. National University of Singapore; 2008. Available from: http://scholarbank.nus.edu.sg/handle/10635/27649

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Luleå University of Technology

6. Jussing, Tomas. Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program.

Degree: 2007, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-47286

► This masters thesis is a part of the nordic collaboration project NorSEN, whose goal is to improve the environmental surveillance in the regions north… (more)

▼ This masters thesis is a part of the nordic collaboration project NorSEN, whose goal is to improve the environmental surveillance in the regions north of the Arctic circle. This implies the build-up of a data-acquisition network that can be used for tracing environmental changes over the years. The data from these sites can also be used as a reference for satellite image validation and to improve the atmospheric correction procedures of satellite imagery. Atmospheric correction is the process where an image taken at satellite level is recreated as it would have looked like on the ground. The signal is distorted along its way through the atmosphere by the means of absorption and scattering. Swedens contribution to this project is a raft with on board spectrometers placed on the lake Torneträsk near Abisko in the summer of 2005. The lake is surrounded by mountains which are often covered with clouds that changes the light conditions. This poses a problem for the atmospheric correction since these types of situations are more difficult to model. The lake is also often exposed to rough weather with strong winds, leading to high waves. When this occurs, it is much harder to calculate the reflectance from the data. Severe rainfalls can also lead to sediments in the lake which changes the lakes reflectance. One part of the project is therefore to evaluate if Torneträsk is a good reference surface. This part will however not be covered by the report. The masters thesis has been devoted to the evaluation and changing of the satellite signal simulation program 6S, which is also able to apply atmospheric correction to known satellite signals. Pictures from the instrument MERIS on board ESAs Earth observation satellite ENVISAT has been available within the project. Some assumptions in 6S that has proved to be a problem is that of horizontal homogeneity and the plane-parallel assumption. Since the clouds and mountains need to be modeled, an inhomogeneous model must be implemented. This can be done by introducing a horizontal x-scale which adds a parameter to all the equations governing the radiative transfer in the atmosphere. Since the x-scale cant go on forever, there must however be a combination of the homogeneous and the inhomogeneous model where the homogeneous assumption is used at the boundary layer of the inhomogeneous model. Tests have been made with a horizontal scale of 300 kilometers. The grid has to be about this wide since the atmosphere is modeled with an altitude of 150 kilometers and it is desired that as many beams as possible, they are traveling with different inclinations, reaches the top of the atmosphere. This however slows down the program significantly. The computation is therefore made with less accuracy the further you get from the lake, while an area of 10 kilometers where the raft is situated is modeled with high accuracy. Up to date it is hard to draw any substantial conclusions about whether the changes made to…

Subjects/Keywords: Technology; atmospheric correction; atmospheric science; NorSEN; Teknik

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jussing, T. (2007). Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-47286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jussing, Tomas. “Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program.” 2007. Thesis, Luleå University of Technology. Accessed March 03, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-47286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jussing, Tomas. “Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program.” 2007. Web. 03 Mar 2021.

Vancouver:

Jussing T. Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program. [Internet] [Thesis]. Luleå University of Technology; 2007. [cited 2021 Mar 03]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-47286.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jussing T. Atmospheric correction in polar and subpolar regions : evaluation and improvements of the 6S program. [Thesis]. Luleå University of Technology; 2007. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-47286

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

7. Ku, Ou (author). Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:39b60a34-bfe3-4852-a193-ec16c2f94506

► Tropospheric delays are considered to be one of the main performance limitations for Interferometric Synthetic Aperture Radar technology when applied to ground deformation monitoring. In… (more)

Subjects/Keywords: InSAR; tropospheric delay; water vapor mapping; atmosphere correction; ERA-Interim atmospheric reanalysis

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ku, O. (. (2017). Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis. (Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:39b60a34-bfe3-4852-a193-ec16c2f94506

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ku, Ou (author). “Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis.” 2017. Thesis, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:39b60a34-bfe3-4852-a193-ec16c2f94506.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ku, Ou (author). “Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis.” 2017. Web. 03 Mar 2021.

Vancouver:

Ku O(. Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis. [Internet] [Thesis]. Delft University of Technology; 2017. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:39b60a34-bfe3-4852-a193-ec16c2f94506.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ku O(. Estimation of InSAR Tropospheric Delay Using ERA-Interim Global Atmospheric Reanalysis. [Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:39b60a34-bfe3-4852-a193-ec16c2f94506

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

8. Brunner, A.E. Spline-based wavefront reconstruction for Shack-Hartmann measurements.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; 10.4233/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:isbn:978-94-6323-422-1 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21

► In the coming decade, a new generation of extremely large-scale ground-based astronomical telescopes will see first light. It is well known that increasing the size… (more)

Subjects/Keywords: adaptive optics; atmospheric correction; wavefront sensing

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brunner, A. E. (2018). Spline-based wavefront reconstruction for Shack-Hartmann measurements. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; 10.4233/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:isbn:978-94-6323-422-1 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21

Chicago Manual of Style (16^th Edition):

Brunner, A E. “Spline-based wavefront reconstruction for Shack-Hartmann measurements.” 2018. Doctoral Dissertation, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; 10.4233/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:isbn:978-94-6323-422-1 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21.

MLA Handbook (7^th Edition):

Brunner, A E. “Spline-based wavefront reconstruction for Shack-Hartmann measurements.” 2018. Web. 03 Mar 2021.

Vancouver:

Brunner AE. Spline-based wavefront reconstruction for Shack-Hartmann measurements. [Internet] [Doctoral dissertation]. Delft University of Technology; 2018. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; 10.4233/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:isbn:978-94-6323-422-1 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21.

Council of Science Editors:

Brunner AE. Spline-based wavefront reconstruction for Shack-Hartmann measurements. [Doctoral Dissertation]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; 10.4233/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; urn:isbn:978-94-6323-422-1 ; urn:NBN:nl:ui:24-uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21 ; http://resolver.tudelft.nl/uuid:a189ad9b-6c6e-4539-bde7-7dc6f1748a21

9. Mograne, Mohamed Abdelillah. Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters.

Degree: Docteur es, Sciences de la Terre et de l’Univers, Espace, 2019, Littoral

URL: http://www.theses.fr/2019DUNK0531

►

La télédétection spatiale de la couleur de l’océan implique l’élimination de la contribution atmosphérique, appelée correction atmosphérique (CA). Au-dessus des eaux claires, cette dernière se… (more)

▼

La télédétection spatiale de la couleur de l’océan implique l’élimination de la contribution atmosphérique, appelée correction atmosphérique (CA). Au-dessus des eaux claires, cette dernière se base sur l’hypothèse que l’eau est totalement absorbante dans le Proche Infra-Rouge (PIR) pour estimer la réflectance atmosphérique et déterminer la réflectance marine. À l’opposé, au-dessus des eaux côtières turbides, la contribution du signal marin n’est pas négligeable dans le PIR. De ce fait, différentes méthodes alternatives ont été proposées. La thèse se consacre à l’évaluation des algorithmes de CA proposés et leur amélioration pour le capteur Ocean and Land Colour Instrument (OLCI) au-dessus des eaux côtières en exploitant sa synergie avec le capteur Sea and Land Surface Temperature Radiometer (SLSTR). Dans ce but, des mesures radiométriques in-situ ont été acquises dans deux zones côtières françaises contrastées : Manche orientale et Guyane Française, avec le spectro-radiomètre ASD, suivant un nouveau protocole d’acquisition et de post-traitement. Le post-traitement s’est basé sur le coefficient de variabilité et la différence relative de la médiane dans le contrôle de qualité, en plus du score d’assurance de qualité (QAS). Suivant l’analyse statistique basée en partie sur l’angle spectral moyenné (SAM), l’inter-comparaison radiométrique de l’ASD avec les autres radiomètres (TriOS-above et Radeau), a révélé la cohérence des mesures ASD. L’utilisation de ces dernières a permis l’inter-comparaison de la performance de cinq algorithmes de CA, où l’algorithme Polymer est le plus performant d’après un système à points avec une seule métrique. Cependant aucun algorithme a atteint le maximum de points soulignant la grande marge de progression à accomplir, surtout en eau côtière. Dans cette optique, trois relations spectrales de la réflectance des aérosols ont été testées sur une base de données simulées suivant la synergie OLCI/SLSTR. Une autre relation, Full Spectrum AC (FSAC) a été développée initialement en combinant deux relations existantes, après l’élimination de l’hypothèse du pixel noir dans l’ultra-violet (UV) et l’intégration d’un schéma itératif. L’inter-comparaison des relations révèle la cohérence de FSAC qui est légèrement moins performante qu’une relation publiée. L’application de FSAC sur des images OLCI/SLSTR ouvrirait des perspectives dans l’amélioration de la CA au-dessus des eaux côtières.

The ocean color remote sensing involves the removal of the atmospheric contribution, the so-called atmospheric correction (AC). Over clear waters, the latter is based on the hypothesis that the sea water is totally absorbent in the Near Infra-Red (NIR), to estimate the atmospheric reflectance and to determine the water reflectance. By contrast, over coastal turbid waters, the marine signal is not negligible in the NIR. Accordingly, different alternative methods were proposed. The thesis is committed to evaluate the proposed AC algorithms and their improvement for the Ocean and Land Colour Instrument (OLCI) sensor over…

Advisors/Committee Members: Loisel, Hubert (thesis director), Jamet, Cédric (thesis director).

Subjects/Keywords: Correction atmosphérique; Olci; Couleur de l'océan; Synergie; Sentinel-3; ASD; Exercice de coïncidence; Inter-comparaison radiométrique; Atmospheric correction; Olci; Ocean coulour; Synergy

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mograne, M. A. (2019). Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters. (Doctoral Dissertation). Littoral. Retrieved from http://www.theses.fr/2019DUNK0531

Chicago Manual of Style (16^th Edition):

Mograne, Mohamed Abdelillah. “Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters.” 2019. Doctoral Dissertation, Littoral. Accessed March 03, 2021. http://www.theses.fr/2019DUNK0531.

MLA Handbook (7^th Edition):

Mograne, Mohamed Abdelillah. “Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters.” 2019. Web. 03 Mar 2021.

Vancouver:

Mograne MA. Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters. [Internet] [Doctoral dissertation]. Littoral; 2019. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2019DUNK0531.

Council of Science Editors:

Mograne MA. Synergie des capteurs spatiaux européens OLCI-SLSTR pour l’étude à long terme de la couleur des eaux côtières : Synergy of OLCI-SLSTR european space-borne sensors for long term study of the color of coastal waters. [Doctoral Dissertation]. Littoral; 2019. Available from: http://www.theses.fr/2019DUNK0531

10. Neukermans, Griet. Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters.

Degree: Docteur es, Sciences de la matière, du rayonnement et de l'environnement. Océanographie, 2012, Littoral

URL: http://www.theses.fr/2012DUNK0406

► Les particules en suspension dans l'eau de mer incluent les sédiments, le phytoplancton, le zooplancton, les bactéries, les virus et des détritus. Ces particules sont… (more)

▼ Les particules en suspension dans l'eau de mer incluent les sédiments, le phytoplancton, le zooplancton, les bactéries, les virus et des détritus. Ces particules sont communément appelés matière en suspension (MES). Dans les eaux côtières, la MES peut parcourir de longues distances et être transportée verticalement à travers la colonne d'eau sous l'effet des vents et des marées favorisant les processus d'advection et de resuspension. Ceci implique une large variabilité spatio-temporelle de MES et quasiment impossible à reconstituer à travers les mesures traditionnelles des concentrations de MES [MES], par filtration de l'eau de mer à bord de bateaux. La [MES] peut être obtenue à partir de capteurs optiques enregistrant la diffusion et déployés soit de manière in-situ, soit à partir d'un satellite dans l'espace. Depuis la fin des années 70, par exemple, les satellites "couleur de l'eau" permettent d'établir des cartes de [MES] globales. La fréquence d'une image par jour pour la mer di Nord de ces capteurs polaires représente un obstacle non négligeable pour l'étude de variabilité de la [MES] dans les eaux côtières où la marée et les vents engendrent des variations rapides au cours de la journée. Cette limitation est d'autant plus importante pour les régions avec une couverture nuageuse fréquente. Les méthodes in-situ à partir d'un navire autonome ou d'une plateforme amarrée permettent d'enregistrer des données en continu mais leur couverture spatiale reste néanmoins limitée. Ce travail a pour objectif de mettre en avant les techniques de mesures in-situ et satellite de la [MES] en se concentrant principalement sur deux points. Premièrement, d'acquérir une meilleure connaissance de la variabilité de la relation entre la [MES] et la lumière diffuse, et deuxièmement, d'établir des cartes de [MES] dans la mer du Nord avec le capteur géostationnaire météorologique Européen (SEVIRI) qui donne des images chaque 15 minutes.La variabilité de la relation entre la [MES] et la lumière diffuse est étudiée à l'aide d'une banque de données in-situ. Nous démontrons que la [MES] est le mieux estimée à partir des mesures dans l'intervalle rouge du spectre de lumière rétro-diffuse. Par ailleurs, la relation entre la [MES] et la rétrodiffusion est gouvernée par la composition organique/inorganique des particules, ce qui représente des possibilités d'amélioration pour les algorithmes d'estimation de [MES] à partir de la couleur de l'eau. Nous démontrons aussi qu'avec SEVIRI il est possible d'estimer la [MES], la turbidité et le coefficient d'atténuation, deux variables étroitement liées à la [MES], avec généralement une bonne précision. Bien qu'il y ait d'importantes incertitudes dans les eaux claires, cette réussite est remarquable pour un capteur météorologique initialement conçu pour le suivi des nuages et des masses glaciaires, cibles beaucoup plus brillantes que la mer! Ce travail démontre pour la première fois que la variabilité de la [MES] à l'échelle temporelle des marées dans les eaux côtières au sud de la mer du Nord peut être… Advisors/Committee Members: Loisel, Hubert (thesis director), Ruddick, Kévin (thesis director).

Subjects/Keywords: Correction atmosphérique; SEVIRI; Bio-optique; Variabilité diurne; Coefficient de rétrodiffusion; Coefficient de diffusion; MODIS; Atmospheric correction; SEVIRI; Bio-optical; Diurnal variability; Back-scattering coefficient; Scattering coefficient; MODIS

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Neukermans, G. (2012). Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters. (Doctoral Dissertation). Littoral. Retrieved from http://www.theses.fr/2012DUNK0406

Chicago Manual of Style (16^th Edition):

Neukermans, Griet. “Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters.” 2012. Doctoral Dissertation, Littoral. Accessed March 03, 2021. http://www.theses.fr/2012DUNK0406.

MLA Handbook (7^th Edition):

Neukermans, Griet. “Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters.” 2012. Web. 03 Mar 2021.

Vancouver:

Neukermans G. Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters. [Internet] [Doctoral dissertation]. Littoral; 2012. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2012DUNK0406.

Council of Science Editors:

Neukermans G. Les particules en suspension dans les eaux côtières turbides : estimation par mesures optique in situ et depuis l'espace : Optical in situ and geostationary satellite-borne observations of suspended particles in coastal waters. [Doctoral Dissertation]. Littoral; 2012. Available from: http://www.theses.fr/2012DUNK0406

11. Luís Gonçalves Longo de Oliveira. Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos.

Degree: 2008, Instituto Nacional de Pesquisas Espaciais

URL: http://urlib.net/sid.inpe.br/[email protected]/2008/04.24.15.52

►

A conversão de números digitais (NDs) de imagens orbitais em quantidades físicas relacionadas à superfície terrestre é dependente de fiel caracterização atmosférica, a qual tem… (more)

▼

A conversão de números digitais (NDs) de imagens orbitais em quantidades físicas relacionadas à superfície terrestre é dependente de fiel caracterização atmosférica, a qual tem sido realizada com medidas obtidas por balões meteorológicos ou por fotômetros solares posicionados em superfície. Recentemente, alguns sensores orbitais vêm produzindo dados que também permitem caracterizar a atmosfera, como os oferecidos pelo MODIS. Neste trabalho, valores de Fatores de Refletância Bidirecional de superfície (FRBs) determinados em campo foram comparados com aqueles estimados a partir de imagens TM/Landsat-5 utilizando-se modelos de transferência radiativa (MTR), sendo que os dados de entrada destes modelos referentes à caracterização da atmosfera foram estimados a partir do emprego de um fotômetro solar CIMEL e de produtos atmosféricos MODIS. Na faixa espectral do visível, as estimativas de FRB realizadas com as caracterizações MODIS foram sempre melhores que as realizadas com dados do fotômetro solar CIMEL. Os RMSE encontrados utilizando-se o MTR 5s para as caracterizações com o fotômetro solar CIMEL foram de 0,0316 (TM1), 0,0237 (TM2) e 0,0218 (TM3) e para as caracterizações com dados MODIS (em média) foram de 0,0246 (TM1), 0,0217 (TM2) e (0,0206) TM3. Nas faixas espectrais do infravermelho próximo e médio, os valores de FRB estimados com dados MODIS se confundem àqueles obtidos com o fotômetro CIMEL. Utilizando-se o MTR 5s, para a caracterização CIMEL os RMSE encontrados foram 0,0410 (TM4), 0,0614 (TM5) e 0,0433 (TM7) e para as caracterizações com dados MODIS (em média) foram de 0,0442 (TM4), 0,0654(TM5) e 0,0451 (TM7). Os resultados demonstraram que os dados MODIS são aplicáveis na conversão de dados orbitais para valores de FRB de superfície.

The conversion of digital numbers (DN) of orbital images to physical quantities of the Earth surface is dependent on a good atmospheric characterization, which has been performed through the use of data collected by meteorological balloons or by sun photometers positioned at the surface. Recently some orbital sensors have generated useful data that can be utilized in this characterization like those generated by the sensor MODIS. Here, surface Bidirectional Reflectance Factors (BRF) estimated from field data were compared to those calculated from TM/Landsat-5 images converted through radiative transfer codes. The input data to run these codes were estimated considering two different sources: a sun photometer and the MODIS sensor. In the visible region the BRF estimated by MODIS data were always quite similar to those based on the sun photometer. The RMSE values determined using MTR 5S based on the sun photometer data were 0.0316 (TM1), 0.0237 (TM2) and 0.0218 (TM3) and for those based on MODIS data 0.0246 (TM1), 0.0217 (TM2) e (0.0206) TM3. In the NIR and SWIR spectral regions, the BRF values estimated through MODIS data were also quite similar to those calculated through solar photometer data. Applying MTR 5S to the sun photometer the RMSE values were 0.0410 (TM4), 0.0614 (TM5)…

Advisors/Committee Members: Flávio Jorge Ponzoni, Elisabete Caria Moraes, Jurandir Zullo Junior, João Antonio Lorenzetti, Evlyn Márcia Leão de Moraes Novo.

Subjects/Keywords: sensoriamento remoto; correção atmosférica; fotômetro solar; Landsat; MODIS; radiometria; atmospheric correction; sun photometer; landsat; MODIS; radiometry

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveira, L. G. L. d. (2008). Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos. (Thesis). Instituto Nacional de Pesquisas Espaciais. Retrieved from http://urlib.net/sid.inpe.br/[email protected]/2008/04.24.15.52

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oliveira, Luís Gonçalves Longo de. “Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos.” 2008. Thesis, Instituto Nacional de Pesquisas Espaciais. Accessed March 03, 2021. http://urlib.net/sid.inpe.br/[email protected]/2008/04.24.15.52.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oliveira, Luís Gonçalves Longo de. “Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos.” 2008. Web. 03 Mar 2021.

Vancouver:

Oliveira LGLd. Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos. [Internet] [Thesis]. Instituto Nacional de Pesquisas Espaciais; 2008. [cited 2021 Mar 03]. Available from: http://urlib.net/sid.inpe.br/[email protected]/2008/04.24.15.52.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oliveira LGLd. Avaliação de metodologias de caracterização atmosférica na conversão de dados radiométricos digitais em valores físicos. [Thesis]. Instituto Nacional de Pesquisas Espaciais; 2008. Available from: http://urlib.net/sid.inpe.br/[email protected]/2008/04.24.15.52

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Damay, Pierre. Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate.

Degree: Docteur es, Physique, 2010, Rouen, INSA

URL: http://www.theses.fr/2010ISAM0020

►

Pour évaluer l'impact d’un rejet accidentel ou chronique de polluants dans les écosystèmes, il est important d’étudier le dépôt sec des aérosols en milieu rural.… (more)

▼

Pour évaluer l'impact d’un rejet accidentel ou chronique de polluants dans les écosystèmes, il est important d’étudier le dépôt sec des aérosols en milieu rural. Le manque de données expérimentales en milieu rural sur la vitesse de dépôt sec des particules ayant une taille inférieure à 1 μm conduit à des incertitudes au vu des modèles et de leurs différences, qui vont jusqu’à dépasser un ordre de grandeur. Le but de cette étude est de développer une mesure directe de la vitesse de dépôt sec des aérosols (Vd), notamment en utilisant un impacteur à basse pression (Electrical Low Pressure Impactor, ELPI, DEKATI), à travers des mesures expérimentales in situ. L’originalité de la méthode est le calcul des flux de dépôt par corrélation turbulente. Les vitesses de dépôt sec ont été obtenues pour des aérosols atmosphériques de tailles comprises entre 7 nm et 2 μm, sur un terrain plat dans le sud-ouest de la France, sous différentes conditions atmosphériques, ainsi que sur différents couverts (maïs, herbe, sol nu). Vd est analysée en fonction du diamètre des particules et l’impact des conditions micro météorologiques est étudié.

To evaluate the impact of accidental or chronic pollutant releases on ecosystems, we must study the dry deposition of aerosols in rural areas. The lack of experimental data on the dry deposition velocity of particle sizes below 1 μm over rural environments leads to uncertainties regarding models and differences between them, which exceed one order of magnitude. The aim of thisstudy is to develop a method, especially using an Electrical Low Pressure Impactor (Outdoor ELPI, DEKATI) to determine aerosol dry deposition velocities (Vd) over rural areas through experimental measurements. This method is based on eddy covariance flux calculation and spectral analysis correction. Dry deposition velocities were obtained for atmospheric aerosols sizing from 7 nm to2 μm, in the South-West of France on a flat terrain under varied meteorological conditions andvaried substrates (maize, grass and earth). Vd was analysed as a function of the particle diameters, and the impact of micrometeorological parameters was studied.

Advisors/Committee Members: Coppalle, Alexis (thesis director).

Subjects/Keywords: Aérosols atmosphériques; Corrélation turbulente; Vitesses de dépôt; Elpi; Atmospheric aerosols; Spectral analysis correction; Deposition velocities; Electrical Low Pressure Impactor

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Damay, P. (2010). Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate. (Doctoral Dissertation). Rouen, INSA. Retrieved from http://www.theses.fr/2010ISAM0020

Chicago Manual of Style (16^th Edition):

Damay, Pierre. “Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate.” 2010. Doctoral Dissertation, Rouen, INSA. Accessed March 03, 2021. http://www.theses.fr/2010ISAM0020.

MLA Handbook (7^th Edition):

Damay, Pierre. “Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate.” 2010. Web. 03 Mar 2021.

Vancouver:

Damay P. Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate. [Internet] [Doctoral dissertation]. Rouen, INSA; 2010. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2010ISAM0020.

Council of Science Editors:

Damay P. Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert : Experimental determination of submicron aerosol dry deposition velocity onto rural canopies : influence of aerosol size, of micrometeorological parameters and of the substrate. [Doctoral Dissertation]. Rouen, INSA; 2010. Available from: http://www.theses.fr/2010ISAM0020

University of Cambridge

13. Crass, Jonathan. The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging.

Degree: PhD, 2014, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/245653https://www.repository.cam.ac.uk/bitstream/1810/245653/3/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/245653/4/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245653/5/thesis.pdf.jpg

► One of the highest resolution astronomical images ever taken in the visible were obtained by combining the techniques of adaptive optics and lucky imaging. The… (more)

▼ One of the highest resolution astronomical images ever taken in the visible were obtained by combining the techniques of adaptive optics and lucky imaging. The Adaptive Optics Lucky Imager (AOLI), being developed at Cambridge as part of a European collaboration, combines these two techniques in a dedicated instrument for the first time. The instrument is designed initially for use on the 4.2m William Herschel Telescope (WHT) on the Canary Island of La Palma. This thesis describes the development of AOLI, in particular the adaptive optics system and a new type of wavefront sensor, the non-linear curvature wavefront sensor (nlCWFS), being used within the instrument. The development of the nlCWFS has been the focus of my work, bringing the technique from a theoretical concept to physical realisation at the WHT in September 2013. The non-linear curvature wavefront sensor is based on the technique employed in the conventional curvature wavefront sensor where two image planes are located equidistant either side of a pupil plane. Two pairs of images are employed in the nlCWFS providing increased sensitivity to both high- and low- order wavefront distortions. This sensitivity is the reason the nlCWFS was selected for use with AOLI as it will provide significant sky-coverage using natural guide stars alone, mitigating the need for laser guide stars. This thesis is structured into three main sections; the first introduces the non-linear curvature wavefront sensor, the relevant background and a discussion of simulations undertaken to investigate intrinsic effects. The iterative reconstruction algorithm required for wavefront reconstruction is also introduced. The second section discusses the practical implementation of the nlCWFS using two demonstration systems as the precursor to the optical design used at the WHT and includes details of subsequent design changes. The final section discusses data from both the WHT and a laboratory setup developed at Cambridge following the observing run. The long-term goal for AOLI is to undertake science observations on the 10.4m Gran Telescopio Canarias, the world's largest optical telescope. The combination of AO and lucky imaging, when used on this telescope, will provide resolutions a factor of two higher than ever before achieved at visible wavelengths. This offers the opportunity to probe the Cosmos in unprecedented detail and has the potential to significantly advance our understanding of the Universe.

Subjects/Keywords: Astronomy; Astrophysics; Instrumentation; Adaptive Optics; Lucky Imaging; Wavefront Sensing; Gerchberg-Saxton; Atmospheric Turbulence; Image Correction; Imaging; Telescope

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Crass, J. (2014). The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/245653https://www.repository.cam.ac.uk/bitstream/1810/245653/3/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/245653/4/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245653/5/thesis.pdf.jpg

Chicago Manual of Style (16^th Edition):

Crass, Jonathan. “The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging.” 2014. Doctoral Dissertation, University of Cambridge. Accessed March 03, 2021. https://www.repository.cam.ac.uk/handle/1810/245653https://www.repository.cam.ac.uk/bitstream/1810/245653/3/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/245653/4/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245653/5/thesis.pdf.jpg.

MLA Handbook (7^th Edition):

Crass, Jonathan. “The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging.” 2014. Web. 03 Mar 2021.

Vancouver:

Crass J. The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging. [Internet] [Doctoral dissertation]. University of Cambridge; 2014. [cited 2021 Mar 03]. Available from: https://www.repository.cam.ac.uk/handle/1810/245653https://www.repository.cam.ac.uk/bitstream/1810/245653/3/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/245653/4/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245653/5/thesis.pdf.jpg.

Council of Science Editors:

Crass J. The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging. [Doctoral Dissertation]. University of Cambridge; 2014. Available from: https://www.repository.cam.ac.uk/handle/1810/245653https://www.repository.cam.ac.uk/bitstream/1810/245653/3/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/245653/4/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/245653/5/thesis.pdf.jpg

Louisiana State University

14. Dash, Padmanava. Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data.

Degree: PhD, Oceanography and Atmospheric Sciences and Meteorology, 2011, Louisiana State University

URL: etd-11102011-213825 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1487

► Cyanobacteria represent a major harmful algal group in fresh to brackish water environments. Lac des Allemands, a freshwater lake of 49 km² southwest of New… (more)

▼ Cyanobacteria represent a major harmful algal group in fresh to brackish water environments. Lac des Allemands, a freshwater lake of 49 km² southwest of New Orleans, Louisiana, provides a natural laboratory for remote characterization of cyanobacteria blooms because of their seasonal occurrence. This dissertation makes a contribution to research methodology pertaining to atmospheric correction of satellite data and development of remote sensing algorithms to quantify cyanobacterial pigments. The Ocean Color Monitor (OCM) sensor provides radiance measurements similar to Sea-viewing Wide Field-of-View Sensor (SeaWiFS) but with higher spatial resolution. However, OCM does not have a standard atmospheric correction procedure and the comprehensive suite of atmospheric correction procedures for ocean (or lake) is not available in the literature in one place. Atmospheric correction of satellite data over inland lakes, estuaries and coastal waters is also challenging due to difficulties in the estimation of aerosol scattering accurately over these optically complex water bodies. Thus an atmospheric correction procedure was developed to obtain more accurate spectral remote sensing reflectance (Rrs) over Lac des Allemands from OCM data based on NASA’s extensive work for SeaWiFS. Since OCM was not well calibrated, a new vicarious calibration procedure was also developed to adjust OCM radiance values to SeaWiFS radiance as SeaWiFS is well calibrated over its entire life. Empirical inversion algorithms were developed to convert the OCM Rrs at bands centered at 510.6 and 556.4 nm to concentrations of phycocyanin (PC), the primary cyanobacterial pigment. For the algorithms to be uniformly valid over all areas (or all bio-optical regimes) of the lake, a holistic approach was developed to minimize the influence of other optically active constituents on the PC algorithms. Similarly, empirical algorithms to estimate chlorophyll a (Chl a) concentrations were developed using OCM bands centered at 556.4 and 669 nm. The best PC algorithm (R²=0.7450, p<0.0001, n=72) yielded a root mean square error (RMSE) of 36.92 µg/L with a relative RMSE of 10.27%, and a mean absolute error (MAE) of 21.79 µg/L with a relative MAE of 6.06% (PC from 2.75 to 363.50 µg/L, n=48). The best algorithm for Chl a (R²=0.7510, p<0.0001) produced an RMSE of 31.19 µg/L, with relative RMSE = 15.70% and a MAE of 16.56 µg/L, with relative MAE = 8.33% (Chl a from 9.46 to 212.76 µg/L, n=48). The results demonstrate the preliminary success of using the 360 x 236 m resolution OCM data to map cyanobacterial blooms in a small lake. While more field data are required to further validate the long-term performance of the algorithms, at present the algorithms may be implemented to process OCM data in an automated setup to provide timely information on the lake’s bloom conditions. Similarly, retrospective processing may provide a long-term time series of bloom characteristics to document potential trends. The…

Subjects/Keywords: Chlorophyll a; Oceansat-1; Case 2 water; OCM; vicarious calibration; atmospheric correction; Chl a; SeaWiFS; PC; Phycocyanin; Cyanobacteria; Remote sensing

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dash, P. (2011). Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-11102011-213825 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1487

Chicago Manual of Style (16^th Edition):

Dash, Padmanava. “Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data.” 2011. Doctoral Dissertation, Louisiana State University. Accessed March 03, 2021. etd-11102011-213825 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1487.

MLA Handbook (7^th Edition):

Dash, Padmanava. “Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data.” 2011. Web. 03 Mar 2021.

Vancouver:

Dash P. Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data. [Internet] [Doctoral dissertation]. Louisiana State University; 2011. [cited 2021 Mar 03]. Available from: etd-11102011-213825 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1487.

Council of Science Editors:

Dash P. Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data. [Doctoral Dissertation]. Louisiana State University; 2011. Available from: etd-11102011-213825 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1487

Delft University of Technology

15. Wiggins, J.C. (author). Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:770fd557-7054-450e-8edb-c61afa246e46

►

This research focuses on using Sentinel-2 optical imagery to provide a means of high-resolution monitoring and evaluation of changes in Total Suspended Matter (TSM) concentration… (more)

▼

This research focuses on using Sentinel-2 optical imagery to provide a means of high-resolution monitoring and evaluation of changes in Total Suspended Matter (TSM) concentration in the Brantas river basin. In situ spectral measurements as well as laboratory results show an extremely turbid nature of the Brantas River surface water. Current monitoring of the river water quality, is done by point measurements representing point estimations of the water quality in time and pace. Interactions within the system are mostly unknown. Having accurate knowledge of near real time water quality information will greatly enhance the effectiveness of the monitoring organizations, especially if this comes in a high spatial and temporal resolution. The Sentinel- 2 remote sensing platform delivers information which can be used to derive such data with a 10m resolution and revisit time of 5 days. To estimate TSM concentrations a multi-conditional algorithm is developed. It uses linear regression for low to medium TSM concentrations based on the green and red band reflectance values and polynomial regression for high to extremely high TSM concentrations based on the red edge NIR band. Testing the multi-conditional algorithm on the WISP-3 in situ spectral data shows the model’s performance is good with r2 = 0.79, RMSE = 66.5 mg/L and NRMSE = 9.7%. Performance of the multi-conditional algorithm is found to be poor when based on Sentinel-2 (S2) bottom of atmosphere data from bands green, red and red edge NIR. However, when recalibrating the polynomial model on Sentinel-2 atmospherically uncorrected top of atmosphere data, results are more promising: r2 = 0.75, RMSE = 64.2 mg/L and NRMSE = 11.3% . Also, TSM estimates from remote sensing reflectances atmospherically corrected by different processors are compared, from which ACOLITE (RMSE = 5.0 mg/L, NRMSE = 25.3%) performs significantly better than C2RCC (RMSE = 11.3 mg/L, NRMSE = 57.5%) and Sen2Cor (RMSE = 42.8 mg/L, NRMSE = 217%). This study shows that 1) high-resolution spatial and temporal variation of TSM concentration estimation can be made visible within the Brantas river basin, 2) an overview of TSM concentration estimation of the entire basin at one moment in time can be achieved and visualised, 3) an extensive historical record of TSM concentration estimations can be accessed, and 4) information is provided to prioritize sampling locations and field surveying times.

Fostering inclusive growth, health and equity by mainstreaming water quality in River Basin Management in the Brantas River Basin, Indonesia

Advisors/Committee Members: Ertsen, M.W. (mentor), Citrosiswoyo, W. (graduation committee), Hariyanto, T. (graduation committee), Hoes, O.A.C. (graduation committee), Laanen, M. (graduation committee), Lhermitte, S.L.M. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Total Suspended Matter; Atmospheric Correction; Remote Sensing; WISP-3; Sentinel-2; multi-conditional algorithm,; Brantas river

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wiggins, J. C. (. (2020). Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:770fd557-7054-450e-8edb-c61afa246e46

Chicago Manual of Style (16^th Edition):

Wiggins, J C (author). “Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia.” 2020. Masters Thesis, Delft University of Technology. Accessed March 03, 2021. http://resolver.tudelft.nl/uuid:770fd557-7054-450e-8edb-c61afa246e46.

MLA Handbook (7^th Edition):

Wiggins, J C (author). “Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia.” 2020. Web. 03 Mar 2021.

Vancouver:

Wiggins JC(. Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Mar 03]. Available from: http://resolver.tudelft.nl/uuid:770fd557-7054-450e-8edb-c61afa246e46.

Council of Science Editors:

Wiggins JC(. Estimating Total Suspended Matter in Low to Extremely High Level Turbid River Surface Waters using a WISP-3 Hyperspectral Radiometer and Sentinel-2 Optical Imagery: A case study conducted on the Brantas River Basin, East-Java, Indonesia. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:770fd557-7054-450e-8edb-c61afa246e46

Bowling Green State University

16. Rupasinghe, Prabha Amali. Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery.

Degree: MS, Geology, 2016, Bowling Green State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467323545

► Lake Erie is well known for its high biodiversity and productive fisheries. Rapid human population growth, urbanization and agricultural development cause various threats to biodiversity… (more)

▼ Lake Erie is well known for its high biodiversity and productive fisheries. Rapid human population growth, urbanization and agricultural development cause various threats to biodiversity in the Lake Erie coastal area. Recently, there has been growing interest in fish diversity and abundance in relation to landscape, land cover and vegetation diversity. In this study, identification of land cover and assessment of biodiversity in the Lake Erie nearshore ecosystems have been conducted using a combination of remote sensing and field data. In collaboration with the University of Toledo and the Ohio Department of Natural Resources, twenty two pre-select sites along the coast of the Western basin were assessed using the airborne NASA Glenn Hyperspectral Imager (HSI) and in-situ hyperspectral measurements for mapping land cover types at different compositional levels. This study also present an insight into the different atmospheric correction models and classification techniques and their applicability to the NASA Glenn HSI data. Eight different atmospheric correction methods and ten different image classification methods were evaluated. The Empirical Line Calibration was chosen as the best atmospheric method for the NASA Glenn HSI images. The MODRAN based models such as ENVI FLAASH and ATCOR are not applicable to the NASA Glenn HSI images. The Support Vector Machine (SVM) classification method results in the highest overall accuracy (85.58%). The error propagation due to the inclusion and exclusion of NIR bands at different pre-processing and processing levels suggests that the highest accuracy was obtained when NIR bands are excluded before the atmospheric corrections (85.58%). The accuracy is somewhat lower (84.89%) when NIR bands are excluded prior to the classification, leaving the lowest accuracy for the case when NIR bands are included in both atmospheric correction and classification steps. To avoid the need of excluding NIR bands, some additional radiometric adjustment of this spectral region should be considered by NASA. The multispectral images collected by Pleiades exhibit lower classification accuracy when compared with the NASA Glenn HSI data (81.35% and 93.28% for a chosen image respectively) even in the case when the NIR bands are excluded from the hyperspectral dataset. It is most likely that spectral resolution causes the trend. The diversity indices (Shannon index and Simpson index) calculated from the NASA Glen HSI images suggest that the diversity in the sites are high (0.67 for Simpson and 1.44 for Shannon). The method is proposed as the baseline for future studies where the biodiversity indices are generated from remote sensing. A spectral library was created for tree and shrub species using the in-situ reflectance measurements to support our analysis and future studies. Advisors/Committee Members: Simic, Anita (Advisor).

Subjects/Keywords: Geographic Information Science; Geography; Geology; Remote Sensing; Botany; Ecology; Lake Erie; Hyperspectral images; Image classification; Atmospheric correction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rupasinghe, P. A. (2016). Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery. (Masters Thesis). Bowling Green State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467323545

Chicago Manual of Style (16^th Edition):

Rupasinghe, Prabha Amali. “Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery.” 2016. Masters Thesis, Bowling Green State University. Accessed March 03, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467323545.

MLA Handbook (7^th Edition):

Rupasinghe, Prabha Amali. “Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery.” 2016. Web. 03 Mar 2021.

Vancouver:

Rupasinghe PA. Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery. [Internet] [Masters thesis]. Bowling Green State University; 2016. [cited 2021 Mar 03]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467323545.

Council of Science Editors:

Rupasinghe PA. Assessment of Shoreline Vegetation in the Western Basin of Lake Erie Using Airborne Hyperspectral Imagery. [Masters Thesis]. Bowling Green State University; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467323545

17. Ni, Zhuoya. Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress.

Degree: Docteur es, Télédétection, 2016, Strasbourg; Université Normale de Beijing (Chine)

URL: http://www.theses.fr/2016STRAD022

►

La fluorescence chlorophyllienne induite par le soleil est une nouvelle façon de suivre l'évolution de la végétation et le cycle global du carbone. Grâce au… (more)

▼

La fluorescence chlorophyllienne induite par le soleil est une nouvelle façon de suivre l'évolution de la végétation et le cycle global du carbone. Grâce au modèle simulé et aux expériences sur le terrain et aéroportée, la recherche multi-échelles de méthode de détection de la fluorescence de la chlorophylle induite par le soleil est développé dans cette thèse. Les principales conclusions et innovations sont les suivantes : 1. Les expériences de contrôle en eau du maïs montrent que la fluorescence passive peut être utilisée pour détecter le stress hydrique des culture. L'analyse de la réponse de la fluorescence et de la température montre que la fluorescence est très sensible au stress hydrique précoce. 2. Après avoir analysé les effets de la température, de l'angle zénithal solaire et du rendement quantique de la fluorescence sur la détermination de la fluorescence, nous proposons une méthode d’obtention de la fluorescence qualitative basée sur l'indice de réflectance. 3. L’analyse des effets de la détermination de la fluorescence aéroportée nous a permis de montrer que l'angle zénithal solaire et la hauteur du capteur aéroporté sont les facteurs importants qui influent sur la détermination de la fluorescence induite par le soleil.

Sun-induced chlorophyll fluorescence is a new way to monitor the vegetation change and global carbon cycle. Through the model simulated analysis, the pot experiment and the airborne flying experiment, the research on detecting the multi-scale sun-induced chlorophyll fluorescence is developed in this dissertation. The main conclusions and innovations are as follows: 1. The maize water control experiments demonstrate that the passive fluorescence can be used to detect the crop water stress, and the analysis of the different responses of the fluorescence and temperature illustrates that the fluorescence is much sensitive to the early water stress. 2. Analyze the effects of temperature, sun zenith angle and fluorescence quantum efficiency on the qualitative fluorescence retrieval, and propose a qualitative fluorescence retrieval method based on the reflectance index. 3. Analyze the effects of airborne fluorescence retrieval, and obtain that sun zenith angle and airborne sensor height are the important factors to affect the sun-induced fluorescence retrieval from the simulated analysis and airborne flying experiment.

Advisors/Committee Members: Nerry, Françoise (thesis director), Sun, Rui-Juan (thesis director).

Subjects/Keywords: Télédétection de la végétation; Fluorescence induite par le soleil; Multi-échelles; Méthode de détermination de la fluorescence; Effets atmosphériques; Correction atmosphérique; Vegetable remote sensing; Sun-induced fluorescence; Multi-scale; Fluorescence retrieval method; Atmospheric effects; Atmospheric correction; 551.4; 621.36

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ni, Z. (2016). Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress. (Doctoral Dissertation). Strasbourg; Université Normale de Beijing (Chine). Retrieved from http://www.theses.fr/2016STRAD022

Chicago Manual of Style (16^th Edition):

Ni, Zhuoya. “Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress.” 2016. Doctoral Dissertation, Strasbourg; Université Normale de Beijing (Chine). Accessed March 03, 2021. http://www.theses.fr/2016STRAD022.

MLA Handbook (7^th Edition):

Ni, Zhuoya. “Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress.” 2016. Web. 03 Mar 2021.

Vancouver:

Ni Z. Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress. [Internet] [Doctoral dissertation]. Strasbourg; Université Normale de Beijing (Chine); 2016. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2016STRAD022.

Council of Science Editors:

Ni Z. Méthode pour l'estimation de la fluorescence de la chlorophylle et son application pour la détection précoce du stress hydrique : Chlorophyll fluorescence retrieval method and its application on detecting the early water stress. [Doctoral Dissertation]. Strasbourg; Université Normale de Beijing (Chine); 2016. Available from: http://www.theses.fr/2016STRAD022

18. Kautz, Jess S. In-Situ Cameras for Radiometric Correction of Remotely Sensed Data .

Degree: 2017, University of Arizona

URL: http://hdl.handle.net/10150/624563

► The atmosphere distorts the spectrum of remotely sensed data, negatively affecting all forms of investigating Earth's surface. To gather reliable data, it is vital that… (more)

▼ The atmosphere distorts the spectrum of remotely sensed data, negatively affecting all forms of investigating Earth's surface. To gather reliable data, it is vital that atmospheric corrections are accurate. The current state of the field of atmospheric correction does not account well for the benefits and costs of different correction algorithms. Ground spectral data are required to evaluate these algorithms better. This dissertation explores using cameras as radiometers as a means of gathering ground spectral data. I introduce techniques to implement a camera systems for atmospheric correction using off the shelf parts. To aid the design of future camera systems for radiometric correction, methods for estimating the system error prior to construction, calibration and testing of the resulting camera system are explored. Simulations are used to investigate the relationship between the reflectance accuracy of the camera system and the quality of atmospheric correction. In the design phase, read noise and filter choice are found to be the strongest sources of system error. I explain the calibration methods for the camera system, showing the problems of pixel to angle calibration, and adapting the web camera for scientific work. The camera system is tested in the field to estimate its ability to recover directional reflectance from BRF data. I estimate the error in the system due to the experimental set up, then explore how the system error changes with different cameras, environmental set-ups and inversions. With these experiments, I learn about the importance of the dynamic range of the camera, and the input ranges used for the PROSAIL inversion. Evidence that the camera can perform within the specification set for ELM correction in this dissertation is evaluated. The analysis is concluded by simulating an ELM correction of a scene using various numbers of calibration targets, and levels of system error, to find the number of cameras needed for a full-scale implementation. Advisors/Committee Members: Yool, Stephen R (advisor), Yool, Stephen R. (committeemember), Tyo, J Scott (committeemember), Czapla-Myers, Jeffery (committeemember).

Subjects/Keywords: Atmospheric Correction; Bidirectional Reflectance; Camera; Remote Sensing; Turfgrass

…Semiconductor COST Not an acronym. Name of Chavez's (citation) atmospheric correction… …Atmospheric Analysis of Hypercubes HATCH High-accuracy Atmospheric Correction for Hyperspectral… …of atmospheric correction does not account well for the benefits and costs of different… …introduce techniques to implement a camera systems for atmospheric correction using off the shelf… …reflectance accuracy of the camera system and the quality of atmospheric correction. In the design…

11 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kautz, J. S. (2017). In-Situ Cameras for Radiometric Correction of Remotely Sensed Data . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/624563

Chicago Manual of Style (16^th Edition):

Kautz, Jess S. “In-Situ Cameras for Radiometric Correction of Remotely Sensed Data .” 2017. Doctoral Dissertation, University of Arizona. Accessed March 03, 2021. http://hdl.handle.net/10150/624563.

MLA Handbook (7^th Edition):

Kautz, Jess S. “In-Situ Cameras for Radiometric Correction of Remotely Sensed Data .” 2017. Web. 03 Mar 2021.

Vancouver:

Kautz JS. In-Situ Cameras for Radiometric Correction of Remotely Sensed Data . [Internet] [Doctoral dissertation]. University of Arizona; 2017. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/10150/624563.

Council of Science Editors:

Kautz JS. In-Situ Cameras for Radiometric Correction of Remotely Sensed Data . [Doctoral Dissertation]. University of Arizona; 2017. Available from: http://hdl.handle.net/10150/624563

19. Geryes, Tony. Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt.

Degree: Docteur es, Sciences de l'ingénieur, 2009, Université Paris-Est

URL: http://www.theses.fr/2009PEST0050

►

La mesure de la radioactivité dans les filtres utilisés pour la surveillance de l’aérocontamination de l’air présente une difficulté métrologique majeure. En effet, l’absorption des… (more)

▼

La mesure de la radioactivité dans les filtres utilisés pour la surveillance de l’aérocontamination de l’air présente une difficulté métrologique majeure. En effet, l’absorption des rayonnements a dans le médium filtrant et la masse d’aérosols accumulés biaisent la réponse nucléaire. Ce travail de thèse porte sur la détermination de facteurs de correction de la dégradation de la radioactivité mesurée dans les filtres de surveillance. Dans un premier temps, des filtres radioactifs représentatifs des prélèvements atmosphériques ont été préparés à l’aide du banc d’essais nucléaire ICARE. L’étude expérimentale sur les filtres de référence a permis d’avoir une base de données pout la détermination des facteurs de correction dans diverses conditions de filtration. Dans un second temps, ce travail a conduit une nouvelle méthode numérique mise au point pour déterminer les facteurs de correction. Il s’agit de coupler des simulations de filtration des particules d’aérosol à l’aide de GeoDict, permettant de calculer des écoulements dans les milieux poreux et des simulations de parcours de particules a dans la matière à l’aide de MCNPX. Le bon accord obtenu, en comparant les réponses des spectres en énergie et des facteurs de correction numériques et expérimentaux, a permis de valider le modèle numérique

The measurement of radioactivity in the filters of airborne radioactive surveillance is a major difficulty metrology. Indeed, the absorption of a radiation in the filter media and the mass of aerosols accumulated distort the nuclear counters response. This thesis work focuses on the determination of correction factors for the radioactivity loss in the survey filters. In a first step, radioactive filters representing the atmospheric samples have been prepared using the nuclear test bench ICARE. The experimental study on reference filters provided a database to determine correction factors for various filtration conditions. The second step of the work proposed a new numerical method developed to determine the correction factors. It consists of coupling GeoDict for particles filtration simulations and MCNPX simulations for a transport in matter. The good agreement obtained by comparing the numerical and experimental correction factors has permitted to validate the numerical model

Advisors/Committee Members: Gehin, Evelyne (thesis director).

Subjects/Keywords: Aérosols radioactifs; Filtre à fibres; Prélèvement atmosphérique; Spectrométrie a; Scintillation liquide; Facteur de correction de la radioactivité; Facteur de correction de la radioactivité GeoDict; Code Monte Carlo MCNPX; Radioactive aerosols; Fiber filters; Atmospheric sampling; A spectrometry; Liquid scintillation; Radioactivity correction factors; Fluid dynamics GeoDict code; Monte Carlo MCNPX code

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Geryes, T. (2009). Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2009PEST0050

Chicago Manual of Style (16^th Edition):

Geryes, Tony. “Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt.” 2009. Doctoral Dissertation, Université Paris-Est. Accessed March 03, 2021. http://www.theses.fr/2009PEST0050.

MLA Handbook (7^th Edition):

Geryes, Tony. “Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt.” 2009. Web. 03 Mar 2021.

Vancouver:

Geryes T. Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt. [Internet] [Doctoral dissertation]. Université Paris-Est; 2009. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2009PEST0050.

Council of Science Editors:

Geryes T. Étude expériementale et numérique de la dégradation de la mesure nucléaire d'aérosols radioactifs prélevés avec des filtres de surveillance : Positivité, séjours en zéro et modèles affines de taux d'intérêt. [Doctoral Dissertation]. Université Paris-Est; 2009. Available from: http://www.theses.fr/2009PEST0050

20. Adeline, Karine. Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution.

Degree: Docteur es, Photonique et systèmes optoélectroniques, 2014, Toulouse, ISAE

URL: http://www.theses.fr/2014ESAE0056

►

La disponibilité de nouveaux moyens d’acquisition en télédétection, satellitaire (PLEIADES, HYPXIM), aéroportée ou par drone (UAV) à très haute résolution spatiale ouvre la voie à… (more)

▼

La disponibilité de nouveaux moyens d’acquisition en télédétection, satellitaire (PLEIADES, HYPXIM), aéroportée ou par drone (UAV) à très haute résolution spatiale ouvre la voie à leur utilisation pour l’étude de milieux complexes telles que les villes. En particulier, la connaissance de la ville pour l’étude des îlots de chaleur, la planification urbaine, l’estimation de la biodiversité de la végétation et son état de santé nécessite au préalable une étape de classification des matériaux qui repose sur l’utilisation de l’information spectrale accessible en télédétection hyperspectrale 0,4-2,5μm. Une des principales limitations des méthodes de classification réside dans le non traitement des zones à l’ombre. Des premiers travaux ont montré qu’il était possible d’exploiter l’information radiative dans les ombres des bâtiments. En revanche, les méthodes actuelles ne fonctionnent pas dans les ombres des arbres du fait de la porosité de leur couronne. L’objectif de cette thèse vise à caractériser les propriétés optiques de surface à l’ombre de la végétation arborée urbaine au moyen d’outils de transfert radiatif et de correction atmosphérique. L’originalité de ce travail est d’étudier la porosité d’un arbre via la grandeur de transmittance de la couronne. La problématique a donc été abordée en deux temps. Premièrement, la caractérisation de la transmittance d’un arbre isolé a été menée avec l’utilisation de l’outil DART à travers la mise en œuvre d’un plan d’expériences et d’études de sensibilité qui ont permis de la relier à des paramètres biophysiques et externes. Une campagne de mesures terrain a ensuite été réalisée afin d’évaluer son estimation à partir de différents niveaux de modélisation de l’arbre, dont un modèle réel acquis par mesures lidar terrestre. Deuxièmement, une nouvelle méthode de correction atmosphérique 3D adaptée à la végétation urbaine, ICARE-VEG, a été développée à partir des résultats précédents. Une campagne aéroportée et de mesures terrain UMBRA a été dédiée à sa validation. Ses performances comparées à d’autres outils existants ouvrent de larges perspectives pour l’interprétation globale d’une image par télédétection et pour souligner la complexité de modéliser des processus physiques naturels à une échelle spatiale très fine.

The new advances in remote sensing acquisitions at very high spatial resolution, either spaceborne (PLEIADES, HYPXIM), airborne or unmanned aerial vehicles borne, open the way for the study of complex environments such as urban areas. In particular, the better understanding of urban heat islands, urban planning, vegetation biodiversity, requires the knowledge of detailed material classification mapsbased on the use of spectral information brought by hyperspectral imagery 0.4-2.5μm. However, one of the main limitations of classification methods relies on the absence of shadow processing. Past studies have demonstrated that spectral information was possible to be extracted from shadows cast by buildings. But existing methods fail in shadows cast by trees because of…

Advisors/Committee Members: Briottet, Xavier (thesis director).

Subjects/Keywords: Télédétection hyperspectrale; Haute résolution spatiale; Ombres; Végétation urbaine; Porosité d’un arbre; Correction atmosphérique; Transfert radiatif; Modélisation; Campagnes aéroportée et de mesures terrain; Hyperspectral remote sensing; High spatial resolution; Shadows; Urban vegetation; Tree crown porosity; Atmospheric correction; Radiative transfer; Modeling; Airborne and field campaigns; 621

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Adeline, K. (2014). Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution. (Doctoral Dissertation). Toulouse, ISAE. Retrieved from http://www.theses.fr/2014ESAE0056

Chicago Manual of Style (16^th Edition):

Adeline, Karine. “Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution.” 2014. Doctoral Dissertation, Toulouse, ISAE. Accessed March 03, 2021. http://www.theses.fr/2014ESAE0056.

MLA Handbook (7^th Edition):

Adeline, Karine. “Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution.” 2014. Web. 03 Mar 2021.

Vancouver:

Adeline K. Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution. [Internet] [Doctoral dissertation]. Toulouse, ISAE; 2014. [cited 2021 Mar 03]. Available from: http://www.theses.fr/2014ESAE0056.

Council of Science Editors:

Adeline K. Classification des matériaux urbains en présence de végétation éparse par télédétection hyperspectrale à haute résolution spatiale : Classification of urban materials in presence of sparse vegetation with hyperspectral remote sensing imagery at high spatial resolution. [Doctoral Dissertation]. Toulouse, ISAE; 2014. Available from: http://www.theses.fr/2014ESAE0056

21. Ko, Jonathan. Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches.

Degree: Electrical Engineering, 2017, University of Maryland

URL: http://hdl.handle.net/1903/20008

► Atmospheric turbulence is a phenomenon of interest in many scientific fields. The direct effects of atmospheric turbulence can be observed in everyday situations. The twinkling… (more)

▼ Atmospheric turbulence is a phenomenon of interest in many scientific fields. The direct effects of atmospheric turbulence can be observed in everyday situations. The twinkling of stars is an indicator of weak atmospheric turbulence while the shimmering of objects above a hot surface is an indicator of strong atmospheric turbulence. The effects of atmospheric turbulence are generally considered a nuisance to optical applications. Image blurring effects are often present when observing distant objects through atmospheric turbulence. Applications that require maintaining the coherence of a laser beam, such as in free space optical communication, suffer from poor link quality in the presence of atmospheric turbulence. Attempts to compensate for the effects of atmospheric turbulence have varied in effectiveness. In astronomical applications, weak cases of atmospheric turbulence have been successfully compensated with the use of a Shack-Hartmann wavefront sensor combined with adaptive optics. Software techniques such as “Lucky Imaging” can be useful when clear images briefly appear through the presence of weak turbulence. However, stronger cases of atmospheric turbulence often found in horizontal or slant paths near the Earth’s surface present a much more challenging situation to counteract. This thesis focuses primarily on the effects of strong or “deep” atmospheric turbulence. The process of compensating for the effects of strong atmospheric turbulence begins with being able to characterize it effectively. A scintillometer measures the scintillation in the intensity of a light source to determine the strength of current turbulence conditions. Thermal fluctuation measurements can also be used to derive the strength of atmospheric turbulence. Experimental results are presented of a developed large aperture scintillometer, thermal probe atmospheric characterization device, and a transmissometer. While these tools are effective in characterizing atmospheric turbulence, they do not provide for a means to correct for turbulence effects. To compensate for the effects of atmospheric turbulence, the development of the Plenoptic Sensor is presented as a wavefront sensor capable of handling strong turbulence conditions. Theoretical and experimental results are presented to demonstrate the performance of the Plenoptic Sensor, specifically in how it leads to adaptive optics algorithms that can rapidly correct for the effects of turbulence. Advisors/Committee Members: Davis, Christopher C (advisor).

Subjects/Keywords: Optics; Atmospheric sciences; Electrical engineering; Adaptive optics; Atmospheric turbulence; Lasers; Plenoptic sensor; Wavefront correction

…atmospheric turbulence change. Examples of performing wavefront correction with a deformable mirror… …beam distortion by atmospheric turbulence," Proc. SPIE 9614, Laser Communication and… …FreeSpace Laser Communication and Atmospheric Propagation XXVII, 93540V (2015)… …Jonathan Ko, Chensheng Wu, and Christopher C. Davis, "Intelligent correction of laser beam… …x29;. vi Table of Contents 1) Atmospheric Turbulence…

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ko, J. (2017). Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/20008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ko, Jonathan. “Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches.” 2017. Thesis, University of Maryland. Accessed March 03, 2021. http://hdl.handle.net/1903/20008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ko, Jonathan. “Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches.” 2017. Web. 03 Mar 2021.

Vancouver:

Ko J. Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches. [Internet] [Thesis]. University of Maryland; 2017. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1903/20008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ko J. Characterizing Atmospheric Turbulence with Conventional and Plenoptic approaches. [Thesis]. University of Maryland; 2017. Available from: http://hdl.handle.net/1903/20008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Cristina Maria Bentz. Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias.

Degree: 1990, Instituto Nacional de Pesquisas Espaciais

URL: http://urlib.net/sid.inpe.br/[email protected]/2005/07.20.03.45

►

Os dados de sensores remotos estão sujeitos a uma série de efeitos radiométricos dependentes das condições ambientais e instrumentais particulares ao momento de aquisição das… (more)

▼

Os dados de sensores remotos estão sujeitos a uma série de efeitos radiométricos dependentes das condições ambientais e instrumentais particulares ao momento de aquisição das cenas. De modo a otimizar a extração de informações intrínsecas aos alvos, procurou-se normalizar ou corrigir estes efeitos indesejados através de transformações radiométricas que aumentam a validade e compreensão dos resultados obtidos. Neste estudo, testou-se a transformação radiométrica dos valores digitais das imagens para reflectâncias corrigidas para os efeitos atmosféricos com um metódo que utiliza informações intrísecas às imagens. Também verificou-se a estabilidade radiométrica do sensor TM/Landsat-5 no período de maio de 1984 à maio de 1986. Os resultados demostraram que os números digitais e reflectâncias apresentam comportamentos distintos ao longo do espectro, sendo os espectros das reflectâncias corrigidas para os efeitos atmosféricos os que mais concordam com os valores de reflectância obtidos em levantamentos espectrorradiométricos de tempo. Os efeitos provocados, mas não eliminados, e o sensor TM manteve-se com respostas estáveis.

Remote sensing data are subject to a series of radiometric effects dependent on environmental and instrumental conditions specific to the image acquisition moment. In order to optimize the extraction of target intrinsec information, it is sought to normalize or correct these unwanted effects by means of radiometric transformations which enhance the validity and comprehensibility of the obtained results. The present study tested digital value radiometric transformations from images to apparent reflectances and to atmospheric effect corrected reflectances by means of a method which uses image intrinsic information. The radiometric stability of TM/Landsat-5 sensor was also observed from May, 1984 to May, 1987. The results showed that digital numbers and reflectances present different behaviours along the spectrum. The spectra of atmospheric corrected reflectances are those that most agree with the values of the reflectances obtained from spectroradiometric field work. The effects due to different illumination and atmospheric conditions were reduced but not eliminated and TM sensor kept stable responses.

Advisors/Committee Members: Ícaro Vitorello, Paulo Roberto Meneses, Eduardo Delgado Assad, Yoshio Edemir Shimabukuro, José Carlos Neves Epiphânio.

Subjects/Keywords: processamento de imagens; Landsat 5; correção radiométrica; refletância espectral; espectrorradiometro; mapeador temático (Landsat); satélites landsat; imagens landsat; efeitos atmosféricos; radiometric correction; spectral reflectance; spectroradiometers; thematic mappers (Landsat); atmospheric correction; atmospheric effects; radiometria

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bentz, C. M. (1990). Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias. (Thesis). Instituto Nacional de Pesquisas Espaciais. Retrieved from http://urlib.net/sid.inpe.br/[email protected]/2005/07.20.03.45

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bentz, Cristina Maria. “Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias.” 1990. Thesis, Instituto Nacional de Pesquisas Espaciais. Accessed March 03, 2021. http://urlib.net/sid.inpe.br/[email protected]/2005/07.20.03.45.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bentz, Cristina Maria. “Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias.” 1990. Web. 03 Mar 2021.

Vancouver:

Bentz CM. Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias. [Internet] [Thesis]. Instituto Nacional de Pesquisas Espaciais; 1990. [cited 2021 Mar 03]. Available from: http://urlib.net/sid.inpe.br/[email protected]/2005/07.20.03.45.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bentz CM. Avaliação da transformação radiométrica dos dados TM/Lansat-5 em reflectâncias. [Thesis]. Instituto Nacional de Pesquisas Espaciais; 1990. Available from: http://urlib.net/sid.inpe.br/[email protected]/2005/07.20.03.45

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology

23. Webber, Eric. Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration.

Degree: 2001, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/6794

► This study evaluates a series of atmospheric correction techniques developed at RIT called Total Inversion. The ability to convert remotely sensed image data to physically… (more)

Subjects/Keywords: Atmospheric correction techniques; NLLSSF; Non-linear least squares spectral fit method; Regression intersection method; RIM; Total Inversion

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Webber, E. (2001). Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/6794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Webber, Eric. “Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration.” 2001. Thesis, Rochester Institute of Technology. Accessed March 03, 2021. https://scholarworks.rit.edu/theses/6794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Webber, Eric. “Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration.” 2001. Web. 03 Mar 2021.

Vancouver:

Webber E. Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration. [Internet] [Thesis]. Rochester Institute of Technology; 2001. [cited 2021 Mar 03]. Available from: https://scholarworks.rit.edu/theses/6794.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Webber E. Sensitivity analysis of atmospheric compensation algorithms for multispectral systems configuration. [Thesis]. Rochester Institute of Technology; 2001. Available from: https://scholarworks.rit.edu/theses/6794

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science

24. Kumar, Vijay. Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships.

Degree: MSc Engg, Faculty of Engineering, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3778

► Exchange of mass (water vapor), momentum, and energy between atmosphere andocean has profound influence on weather and climate. This exchange takes place at the air-sea… (more)

▼ Exchange of mass (water vapor), momentum, and energy between atmosphere andocean has profound influence on weather and climate. This exchange takes place at the air-sea interface, which is part of the marine atmospheric boundary layer. Various empirical relations are being used for estimating these fluxes in numericalweather and climate models but their accuracies are not sufficiently verified or tested over the Indian Ocean. The main difficulty is that vast areas of open oceans are not easily accessible. The marine environment is very corrosive and unattended long term and accurate measurements are extremely expensive. India has research ships that spend most of their time over the seas around India but that opportunity is yet to be exploited. To address this, an air-sea flux measurement system for operation on board research ships was planned. The system was tested on board Indian Research Vessels ORV SagarKanya during its cruise SK-296 in the Bay of Bengal (BoB) in July-August 2012, and NIO ship Sindhu Sadhana in June-July 2016. The complete set included instruments for measuring wind velocity, windspeed and direction, air and water temperature, humidity, pressure, all components of radiation and rainfall. In addition, ship motion was recorded at required sampling rate to correct for wind velocity. The set up facilitates the direct computation of sensible and latent heat fluxes using the eddy covariance method. In this thesis, design and installation of meteorological and ship motion sensors onboard research ships, data collection and quality control, computation of fluxes of heat, moisture and momentum using eddy covariance method and their comparison with those derived from bulk method are described. A set of sensors (hereafter, flux measuring system) were mounted on a retractable boom, ~7 m long forward of the bow to minimize the flow disturbance caused by the ship superstructures. The wind observed in the ship frame was corrected for ship motion contaminations. During the CTCZ cruise period true mean wind speed was over 10 m/s and true wind direction was South/South-Westerly. True windspeedis computed combiningdata from the anemometer a compass connected to AWS and a GPS. Turbulent fluxes were computed from motion-corrected time-series of high frequency velocity, water vapor, and air temperature data. Covariance latent heat flux, sensible heat flux, and wind stress were obtained by cross-correlating the motion-corrected vertical velocity with fast humidity fluctuations measured with anIR hygrometer, temperate fluctuation from sonic anemometer and motion-corrected horizontal windfluctuations from sonic anemometer, respectively. During the first attempt made in July-August 2012 as part of a cruise of CTCZ monsoonresearch program, observations were mainly taken in the North Bay of Bengal. The mean air-temperature and surface pressure were ~28 Deg… Advisors/Committee Members: Bhat, G S (advisor).

Subjects/Keywords: Air-sea Flux Measuring System; Surface Wave Dynamics Experiment; Southern Ocean Waves Experiment; Global Atmospheric Research Programmme; Air-sea Flux Measurements; Sea-Air Fluxes; Sea Surface Temperature (SST); Ship Cruise; Bay of Bengal Boundary Layer Experiment (BoBBLE); Ship Motion Correction; Latent Heat Flux; tmospheric and Oceanic Sciences

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kumar, V. (2018). Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3778

Chicago Manual of Style (16^th Edition):

Kumar, Vijay. “Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships.” 2018. Masters Thesis, Indian Institute of Science. Accessed March 03, 2021. http://etd.iisc.ac.in/handle/2005/3778.

MLA Handbook (7^th Edition):

Kumar, Vijay. “Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships.” 2018. Web. 03 Mar 2021.

Vancouver:

Kumar V. Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships. [Internet] [Masters thesis]. Indian Institute of Science; 2018. [cited 2021 Mar 03]. Available from: http://etd.iisc.ac.in/handle/2005/3778.

Council of Science Editors:

Kumar V. Installation and Operation of Air-Sea Flux Measuring System on Board Indian Research Ships. [Masters Thesis]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3778

Freie Universität Berlin

25. Schröder, Thomas. Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms.

Degree: 2005, Freie Universität Berlin

URL: http://dx.doi.org/10.17169/refubium-11210

► This thesis describes the development and validation of two inversion algorithms based on an explicit and an implicit atmospheric correction scheme to retrieve the concentration… (more)

▼ This thesis describes the development and validation of two inversion algorithms based on an explicit and an implicit atmospheric correction scheme to retrieve the concentration and distribution of water constituents in European coastal waters from multi-spectral satellite data. The algorithms are designed for radiance measurements of the grating spectrometer MERIS on board of the ENVISAT satellite of the European Space Agency ESA. A validation of all inversion steps is performed with a match-up analysis of in situ measurements taken simultaneously to the satellite overpasses. The findings of this thesis contribute to a deeper understanding of possible operational algorithms and their limitations in the retrieval of the water constituents: chlorophyll-a, total suspended matter and yellow substance absorption at 443 nm. The developed algorithms are based on the inversion of radiative transfer simulations by using artificial neural network techniques. Compared to standard look-up table approaches the main advantages of artificial neural networks are their ability to continously approximate the function's output data and their robustness against noisy input data. Standard methods for the retrieval of water constituents from satellite measurements consist of two steps: an explicit atmospheric correction to derive the spectral reflectance of the water body at mean sea level followed by an inversion method to retrieve the water constituents from the previously atmospherically corrected spectra. Often more than 90% of the total measured signal originates from atmospheric scattering. Beside the choice of the bio-optical model, the accuracy of the water retrieval is directly related to the accuracy of the explicit atmospheric correction scheme. To overcome possible errors in an atmospheric correction this work investigates the accuracy and limits of an implicit atmospheric correction method, which directly relates the satellite measured signal at the top of the atmosphere to the concentrations of the water constituents. The results of this so called direct inversion method are compared both to in situ measurements as well as to an indirect inversion algorithm based on an explicit atmospheric correction. Advisors/Committee Members: n (gender), Univ.-Prof. Dr. Jürgen Fischer (firstReferee), Univ.-Prof. Dr. Hermann Kaufmann (furtherReferee).

Subjects/Keywords: Remote sensing; coastal waters; atmospheric correction; MERIS; radiative transfer; artificial neural networks; 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Schröder, T. (2005). Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms. (Thesis). Freie Universität Berlin. Retrieved from http://dx.doi.org/10.17169/refubium-11210

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Schröder, Thomas. “Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms.” 2005. Thesis, Freie Universität Berlin. Accessed March 03, 2021. http://dx.doi.org/10.17169/refubium-11210.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Schröder, Thomas. “Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms.” 2005. Web. 03 Mar 2021.

Vancouver:

Schröder T. Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms. [Internet] [Thesis]. Freie Universität Berlin; 2005. [cited 2021 Mar 03]. Available from: http://dx.doi.org/10.17169/refubium-11210.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schröder T. Remote sensing of coastal waters with MERIS on basis of explicit and implicit atmospheric correction algorithms. [Thesis]. Freie Universität Berlin; 2005. Available from: http://dx.doi.org/10.17169/refubium-11210

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Cai, Lei. Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework.

Degree: MS, Geography, 2014, University of Kansas

URL: http://hdl.handle.net/1808/18089

► A dynamical downscaling framework is adopted to explore historical (1950-1999) and projected (2050-2099) behavior of extreme precipitation (PR), maximum temperature (TMAX) and minimum temperature (TMIN)… (more)

▼ A dynamical downscaling framework is adopted to explore historical (1950-1999) and projected (2050-2099) behavior of extreme precipitation (PR), maximum temperature (TMAX) and minimum temperature (TMIN) events within the contiguous United States. Compared to reanalysis data, simulations represent temperature better than precipitation, and the model performs better east of the Rocky Mountains than over the mountainous west. Extreme events are defined according to exceedances of percentiles of the distribution of precipitation and temperature variables (typically the 90th, 95th, and 99th percentiles), as well as the actual magnitudes corresponding to the percentiles. After applying a bias-correction to all three variables, extreme percentile thresholds show broadly higher values for all three variables in the projected simulation compared to the historical simulation. Precipitation extremes show no systematic trends of frequency or intensity in either the historical or the projected simulations. Trends of TMAX and TMIN have frequency and intensity that are consistently positive in the historical simulation, but the positive trend patterns are somewhat different in the projected simulation. In the projected simulation, all climate zones exhibit consistent increases in PR and TMAX extremes, and a decrease in TMIN extremes, both in the frequency and intensity. Northern zones such as Dfa and Dfb exhibit more changes of extremes in the projected simulation compared to other zones. On the other hand, the patterns of extreme frequency and intensity in all zones suggest their dependence on regional climatologies (e.g., B class zones have more frequent TMAX and less frequent PR than other zones, while D class zones have lower TMAX and TMIN intensity than other zones). In the projected simulation, PR intensity increases more significantly than frequency, while frequency increases more than intensity for TMAX and TMIN. The projected heat waves (defined as high temperature events lasting multiple days) are more severe in both number and duration, which results predominately from the increasing of the mean TMAX. Advisors/Committee Members: Mechem, David B. (cmtemember), Brunsell, Natheniel A. (cmtemember), Young, Bryan C. (cmtemember).

Subjects/Keywords: Atmospheric sciences; Climate change; bias correction; climate classification; dynamical downscaling; extreme events; heat waves

…atmospheric pro- 2 cesses that only the RCM could provide. Downscaled output described better… …state-of-the-art atmospheric simulation system that is efficient on parallel computing… …vertical atmospheric levels and 4 soil layers. Various parameterization schemes are employed for… …the reanalysis. Before performing more in-depth analysis, we apply bias correction on the… …precipitation field. Although not strictly necessary, for consistency we also apply a bias correction…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cai, L. (2014). Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/18089

Chicago Manual of Style (16^th Edition):

Cai, Lei. “Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework.” 2014. Masters Thesis, University of Kansas. Accessed March 03, 2021. http://hdl.handle.net/1808/18089.

MLA Handbook (7^th Edition):

Cai, Lei. “Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework.” 2014. Web. 03 Mar 2021.

Vancouver:

Cai L. Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework. [Internet] [Masters thesis]. University of Kansas; 2014. [cited 2021 Mar 03]. Available from: http://hdl.handle.net/1808/18089.

Council of Science Editors:

Cai L. Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework. [Masters Thesis]. University of Kansas; 2014. Available from: http://hdl.handle.net/1808/18089

Wright State University

27. Depoy, Randy S., Jr. Mitigating atmospheric phase errors in SAL data.

Degree: PhD, Electrical Engineering, 2020, Wright State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1610632181418557

► Synthetic aperture ladar (SAL) is an emerging remote sensing technology capable of providing high-resolution, interpretable, and timely imagery. SAL and synthetic aperture radar (SAR) are… (more)

▼ Synthetic aperture ladar (SAL) is an emerging remote sensing technology capable of providing high-resolution, interpretable, and timely imagery. SAL and synthetic aperture radar (SAR) are similar in that they provide high-resolution imagery suitable for a wide-variety of applications beyond the diffraction limit of the real aperture. Several advantages of SAL are; realistic imagery resulting from diffuse scattering of optically-rough objects, fine directionality of laser beam making the technology inherently low probability-of-detect, and shorter synthetic aperture collection times, all of which result from operating at optical as opposed to RF wavelengths. With the dramatic decrease in wavelength, SAL systems become more susceptible to phase errors induced by platform motion, vibration, and atmospheric turbulence. In this research effort, we focus on mitigating the detrimental effects of atmospheric turbulence on SAL image quality. We show that traditional autofocusing algorithms; Phase Gradient Autofocus (PGA), Sharpness-based Autofocus, and Sparsity Driven Autofocus (SDA), are unable to mitigate atmospheric phase errors due to their spatially-variant nature.We overcome the challenge imposed by spatially-variant atmospheric phase errors through the use of a model-based image reconstruction framework. Utilizing this framework we implement three different spatially-variant model error correction algorithms; Moving Target Autofocus (MTA), Spatially-variant Phase Correction (SVPC), and Model-based Atmospheric Phase Correction (MBAPC) algorithms. The MTA algorithm is a spatially-variant phase error estimation algorithm originally designed for focusing moving targets in SAR. We develop an image-quality metric (IQM) based parameter tuning algorithm that enables the success of the MTA algorithm for the unique challenges presented by atmospheric phase errors. Both SVPC and MBAPC are spatially-variant model error correction algorithms developed to handle atmospheric phase errors corrupting SAL data. In SVPC we estimate the atmospheric phase error for all targets in the scene, under the assumption that the scene is inherently sparse. In MBAPC we decompose the atmospheric phase errors onto well-established spatial basis sets, Zernike polynomials and Fourier series. The spatial basis sets are used to parametrically represent the spatial variations of the atmospheric phase error throughout the scene.We implement the model error correction algorithms with a sparse image reconstruction (SIR) algorithm and quantify their performance using multiple simulations. We design an atmospheric ray trace simulation to test the efficacy of the three model error correction algorithms for wide-range of turbulence strengths. The atmospheric phase perturbations are simulated by tracing diverging rays through multiple Kolmogorov-distributed atmospheric phase screens. Utilizing the developed IQM-based parameter tuning algorithm we optimize each algorithm, in the sense that image sharpness is maximized across all turbulence strengths. Lastly, we… Advisors/Committee Members: Shaw, Arnab K. (Advisor).

Subjects/Keywords: Electrical Engineering; Remote Sensing; synthetic aperture ladar; synthetic aperture lidar; autofocus; SAL; model-based reconstruction; sparse image formation; sparse image reconstruction; model error correction; atmospheric phase error; phase error; spatially-variant phase error

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Depoy, Randy S., J. (2020). Mitigating atmospheric phase errors in SAL data. (Doctoral Dissertation). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1610632181418557

Chicago Manual of Style (16^th Edition):

Depoy, Randy S., Jr. “Mitigating atmospheric phase errors in SAL data.” 2020. Doctoral Dissertation, Wright State University. Accessed March 03, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1610632181418557.

MLA Handbook (7^th Edition):

Depoy, Randy S., Jr. “Mitigating atmospheric phase errors in SAL data.” 2020. Web. 03 Mar 2021.

Vancouver:

Depoy, Randy S. J. Mitigating atmospheric phase errors in SAL data. [Internet] [Doctoral dissertation]. Wright State University; 2020. [cited 2021 Mar 03]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1610632181418557.

Council of Science Editors:

Depoy, Randy S. J. Mitigating atmospheric phase errors in SAL data. [Doctoral Dissertation]. Wright State University; 2020. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1610632181418557

28. Weghorst, Pamela L. MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie.

Degree: MS, College of Arts and Sciences / Department of Geology, 2008, Kent State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=kent1215460385

► The purpose of this study was to use Moderate Resolution Imaging Spectroradiometer (MODIS) chlorophyll data to identify the predominant spatial and temporal patterns in… (more)

Subjects/Keywords: Freshwater Ecology; Geology; Hydrology; Remote Sensing; chlorophyll; Lake Erie; remote sensing; algorithm; atmospheric correction

…frequency of satellite over-passes, cloud cover, the accuracy of atmospheric correction procedures… …interference. Most methods of atmospheric correction assume that the water’s near infrared… …atmospheric correction presents a fifth complication (Martin, 2004; Jorgensen, 2004; IOCCG… …atmospheric corrections were not considered. The initial regression results showed no correlation… …algorithm performance. This result supports the hypothesis that a more advanced correction…

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Weghorst, P. L. (2008). MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie. (Masters Thesis). Kent State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=kent1215460385

Chicago Manual of Style (16^th Edition):

Weghorst, Pamela L. “MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie.” 2008. Masters Thesis, Kent State University. Accessed March 03, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1215460385.

MLA Handbook (7^th Edition):

Weghorst, Pamela L. “MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie.” 2008. Web. 03 Mar 2021.

Vancouver:

Weghorst PL. MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie. [Internet] [Masters thesis]. Kent State University; 2008. [cited 2021 Mar 03]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=kent1215460385.

Council of Science Editors:

Weghorst PL. MODIS algorithm assessment and principal component analysis of chlorophyll concentration in Lake Erie. [Masters Thesis]. Kent State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=kent1215460385

Universidade Estadual de Campinas

29. Mercante, Erivelto. Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state.

Degree: 2007, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/257016

► Abstract: Studies and researches referring to attendance of the agropecuary production have a determinant strategic importance in the economy of the country. In the last… (more)

▼ Abstract: Studies and researches referring to attendance of the agropecuary production have a determinant strategic importance in the economy of the country. In the last years, those researches have been suffering great transformations to become less subjectives. The association of the remote sensing technique and statistic methods can provide a synoptic view of the seeded areas, in this manner producing information about the planted area of the crops and the variability on them. However, the use of data from the images of satellite is stipulated mainly to the reflectivity properties and absorption of the surface components and also for the atmosphere behaviour. Amongst the crops of great economic value, the soybean (Glycine max (L) Merrill.) emphasizes as one of the main product of the Brazilian agriculture, assuming big economic importance in the exportations. The Paraná state stands out as one of the biggest agricultural producers of the country, and its economy is based mainly towards to the production of grains. In this context, the aim of the research was study the relation between the spectral behaviour of the soybean crop with the end yield along its development cycle, producing information and methodologies to assist the attendance of the production and area estimation of the western Paraná region crop. The areas monitored reach 36 municipal districts and two agricultural commercial areas located near of Cascavel/PR. It was used images from satellite Landsat 5/TM (orbit/point 223/77) and images of the satellite Terra sensor MODIS (product MOD13Q1), then characterizing the crossing scale between the images from both sensors with different spatial resolution. Crop yield data were collected, in the local scale (to both monitored areas) and in the regional scale together with the Secretary of Agriculture (SEAB) (to the 36 municipal districts). Through the satellites images, the soybean crop was monitored in the 2003/2004 and 2004/2005 harvests. For the use of images from the satellite Landsat 5/TM of multitemporal form was realized the proceeding of atmospheric correction and image normalization. In the aim of distinguishing the biomass spectral answer of the soybean crop and its relation to the end yield, it was created images referring to vegetation indexes NDVI and GVI. It was accomplished analyses of correlation and regression between the yield data (variable predict) and spectral data (variable predictor) derived from vegetation indexes (NDVI and GVI) in municipal level (36 municipal districts) and local (two areas). The results obtained with the atmospheric correction and image normalization presented coherent as to the spectral behaviour of the vegetation and soil target. After the area mapping with the soybean crop (soybean mask) by the temporary images of Landsat 5/TM, it was possible to realize the cross-scale to the MODIS sensor. The spectral behaviour of the crop was showed different in the Landsat 5/TM images to the apparent reflectance usage, surface and normalization. By mean of the graphics of… Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Lamparelli, Rubens Augusto Camargo, 1955- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola (institution), Programa de Pós-Graduação em Engenharia Agrícola (nameofprogram), Zullo Junior, Jurandir (committee member), Uribe-Opazo, Miguel Angel (committee member), Imai, Nilton Nobohiro (committee member), Weill, Mara de Andrade Marinho (committee member).

Subjects/Keywords: Sensoriamento remoto; LANDSAT (Satelites); Processamento de imagens; Soja; Análise espectral; Remote sensing; Landsat 5/TM; MODIS; NDVI; GVI; Atmospheric correction; Image normalization; Soybean yield

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mercante, E. (2007). Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/257016

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mercante, Erivelto. “Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state.” 2007. Thesis, Universidade Estadual de Campinas. Accessed March 03, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257016.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mercante, Erivelto. “Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state.” 2007. Web. 03 Mar 2021.

Vancouver:

Mercante E. Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state. [Internet] [Thesis]. Universidade Estadual de Campinas; 2007. [cited 2021 Mar 03]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/257016.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mercante E. Dinamica espectral da cultura da soja ao longo do ciclo vegetativo e sua relação com a produtividade na região oeste do Parana: Spectral dynamic of the soybean crop along the vegetative cycle and its relation with the yield in the western region of Parana state. [Thesis]. Universidade Estadual de Campinas; 2007. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/257016

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Uppsala University

30. Helmersson, Irene. Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion.

Degree: LUVAL, 2010, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977

► The expected technical lifetime for a wind turbine is 20-25 years (Wizelius, 2007). In the process of planning a wind farm on a site… (more)

▼ The expected technical lifetime for a wind turbine is 20-25 years (Wizelius, 2007). In the process of planning a wind farm on a site an estimation of the average wind speed and the energy yield is required from the site. Due to large fluctuations in wind velocity from one year to another it is, from a climatologically point of view, not sufficient to measure the wind for a short period of time, e.g. one year. The year measured may have uncommonly high or uncommonly low winds and thereby generate an average not representative of the wind climate on the site. In the same time it is neither practical nor economically desirable to measure for a longer time period. Instead the measured data collected for a short period of time is scaled into a normal year before it is used to calculate the energy content. This normal year correction can be preformed using different methods. Principally, the methods relate the short time series, measured on the site, to one or more variables of a long time reference series. As a long time reference series the geostrophic wind on the site or a series of measured wind nearby can be used. If the correlation between the two series is sufficiently high a normal year correction may be done using the relation. Normal year correction has foremost been done using the relation between the velocities of the measured wind and a reference wind. The purpose in this study is to evaluate and implement a part of an algorithm for normal year correction considering additional variables besides wind velocity. The relationships studied are between measured wind speed and geostrophic wind speed, geostrophic wind direction and time of the year. For the purpose of evaluating the algorithm two wind data series from Näsudden, on the Swedish island of Gotland, for a period of 15 years has been used. Measured wind on 75 meters and geostrophic wind on 850hPa. Where the geostrophic wind has been used as a long time reference and the measured wind for one year at the time has been related to this reference. The relation has then been used together with the geostrophic wind data to create an estimation of the wind climate on Näsudden in three steps. Step one establishes the estimation due to the relation of geostrophic wind speed. Step two corrects the estimation due to the relation of geostrophic wind direction and step three corrects the estimation due to the relation of time of year. The conclusions from this study showed that with the method used for implementing the algorithm the normal year correction using only the relation between the velocities of the measured wind and the geostrophic wind gives the best estimation of the climatically mean wind speed. The standard deviation gives a 5 % risk for more than 0.436 m/s error for estimation of the mean wind on the site, which…

Subjects/Keywords: Normal year correction; season dependence; wind direction dependence; NCAR/NCEP; Normalårskorrigering; NCAR/NCEP; säsongsberoende; vindriktningsberoende; Meteorology and Atmospheric Sciences; Meteorologi och atmosfärforskning

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Helmersson, I. (2010). Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Helmersson, Irene. “Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion.” 2010. Thesis, Uppsala University. Accessed March 03, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Helmersson, Irene. “Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion.” 2010. Web. 03 Mar 2021.

Vancouver:

Helmersson I. Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion. [Internet] [Thesis]. Uppsala University; 2010. [cited 2021 Mar 03]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Helmersson I. Uppskattning av vindklimat : – Implementering och utvärdering även metod för normalårskorrektion. [Thesis]. Uppsala University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303977

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations