subject:(dual polarization radar)

University of Oklahoma

1. May, Ryan Michael. Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction.

Degree: PhD, 2014, University of Oklahoma

► Correction for rain attenuation is an important data quality issue when using data collected by radars operating at attenuating wavelengths, specifically C and X bands.… (more)

Subjects/Keywords: polarimetric radar; dual-polarization; attenuation; simulation

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APA (6^th Edition):

May, R. M. (2014). Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/13621

Chicago Manual of Style (16^th Edition):

May, Ryan Michael. “Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction.” 2014. Doctoral Dissertation, University of Oklahoma. Accessed March 06, 2021. http://hdl.handle.net/11244/13621.

MLA Handbook (7^th Edition):

May, Ryan Michael. “Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction.” 2014. Web. 06 Mar 2021.

Vancouver:

May RM. Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction. [Internet] [Doctoral dissertation]. University of Oklahoma; 2014. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/11244/13621.

Council of Science Editors:

May RM. Estimating and Mitigating Errors in Dual-Polarization Radar Attenuation Correction. [Doctoral Dissertation]. University of Oklahoma; 2014. Available from: http://hdl.handle.net/11244/13621

Penn State University

2. Tobin, Dana Marie. Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/29519

► Recent studies document a polarimetric radar signature of refreezing. The signature is characterized by a low-level enhancement in differential reflectivity (ZDR) and decrease in co-polar… (more)

▼ Recent studies document a polarimetric radar signature of refreezing. The signature is characterized by a low-level enhancement in differential reflectivity (ZDR) and decrease in co-polar correlation coefficient (ρhv) within a region of decreasing radar reflectivity factor at horizontal polarization (ZH) toward the ground. The signature is examined for the first time in conjunction with crowdsourced precipitation reports and thermodynamic data. Time-averaged quasi-vertical profiles (QVPs) retain the most prominent features of the signature, which appear to line up with certain thermodynamic features among cases. The height at which the low-level ZDR values begin to increase towards the ground corresponds to wet-bulb temperatures (Tw) = -5 °C, and may indicate the height at which freezing begins. Humidity profiles suggest the local generation of anisotropic crystals growing at the expense of small liquid drops via evaporation and vapor deposition. These crystals may promote the refreezing of fully melted hydrometeors via contact nucleation. Some regions suggest the rapid cooling of hydrometeors, that may act to freeze drops quickly and reduce their fall speeds, which may be responsible for producing an enhancement in ZH near the top of the refreezing layer (RFL) present in some cases. The evolution of the signature is also examined during three winter storms in which surface precipitation type transitions from ice pellets to freezing rain. Synoptic analyses reveal similarities among these cases in the location of nearby surface features associated with an approaching low-pressure system, namely an advancing warm front and an inverted surface trough, and strong warm-air advection aloft at 850 hPa and weak temperature advection at the surface. During transition events, the refreezing signature descends monotonically and intersects the ground at the time of the transition. A simple method for forecasting this changeover time from quasi-vertical profiles (QVPs) of polarimetric radar data is developed and compared to crowdsourced precipitation reports and surface precipitation types derived from Rapid Refresh (RAP) model wet-bulb temperatures (Tw) and a recently developed background precipitation classification algorithm. This simple technique shows greater skill in predicting changeover times as compared to forecasts based on RAP Tw profiles. The repeatability of the refreezing signature’s descent in precipitation transition events from ice pellets to freezing rain suggests the potential for its use in operational settings. Advisors/Committee Members: Matthew Robert Kumjian, Thesis Advisor/Co-Advisor, Jerry Y Harrington, Thesis Advisor/Co-Advisor, Yvette Pamela Richardson, Thesis Advisor/Co-Advisor.

Subjects/Keywords: ice pellets; microphysics; refreezing; polarimetric; dual-polarization; radar; wet-bulb temperature

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APA (6^th Edition):

Tobin, D. M. (2016). Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/29519

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):

Tobin, Dana Marie. “Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing.” 2016. Thesis, Penn State University. Accessed March 06, 2021. https://submit-etda.libraries.psu.edu/catalog/29519.

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

MLA Handbook (7^th Edition):

Tobin, Dana Marie. “Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing.” 2016. Web. 06 Mar 2021.

Vancouver:

Tobin DM. Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 06]. Available from: https://submit-etda.libraries.psu.edu/catalog/29519.

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

Council of Science Editors:

Tobin DM. Polarimetric and Thermodynamic Observations of Hydrometeor Refreezing. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/29519

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

Colorado State University

3. Basarab, Brett Michael. Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables.

Degree: MS(M.S.), Atmospheric Science, 2015, Colorado State University

URL: http://hdl.handle.net/10217/166859

► Thunderstorms impact their environment in a variety of ways, including the production of nitrogen oxides (NOₓ) by lightning (LNOₓ). Accurate prediction of total lightning flash… (more)

▼ Thunderstorms impact their environment in a variety of ways, including the production of nitrogen oxides (NOₓ) by lightning (LNOₓ). Accurate prediction of total lightning flash rate in thunderstorms is important to improve estimates of LNOₓ from the storm scale to the global scale. New flash rate parameterization schemes have been developed based on observed relationships between lightning flash rate and storm parameters for Colorado thunderstorms during the Deep Convective Clouds and Chemistry (DC3) experiment. Storm total flash rates are determined using an automated flash counting algorithm that clusters very high frequency (VHF) radiation sources emitted by electrical breakdown in clouds and detected by the northern Colorado lightning mapping array (LMA). Storm parameters such as hydrometeor echo volumes and ice masses are calculated from polarimetric radar retrievals. Measurements of updraft strength are obtained by synthesizing radial velocity retrievals from the CSU-CHILL and CSU-Pawnee radars to determine three-dimensional wind fields. Bulk storm parameters including the graupel echo volume, 30-dBZ echo volume, and precipitating ice mass are found to be robustly correlated to flash rate (R² ~ 0.8). It is shown that simple flash rate parameterization schemes based on these quantities predict gross flash rate behavior reasonably well. Updraft intensity-based flash rate schemes are also developed, but updraft parameters were not as strongly correlated to flash rate as storm volume quantities. The use of multiple storm parameters to predict flash rate is also investigated, since flash rate may be sensitive to multiple processes or characteristics within thunderstorms. A simple approach is found to be most effective: storm-total graupel and reflectivity echo volumes were split up into representative area and height dimensions and regressed against flash rate. The combined quantities predict flash rate variability somewhat better than simpler single-parameter flash rate schemes. All new flash rate schemes are tested against observations of Alabama thunderstorms documented during DC3 to examine their potential regional limitations. The flash rate schemes developed work best for strong Colorado storms with sustained high flash rates. Finally, relationships between total flash rate and flash size are discussed, with implications for the improved prediction of LNOₓ. Advisors/Committee Members: Rutledge, Steven (advisor), Deierling, Wiebke (committee member), Kreidenweis, Sonia (committee member), Reising, Steven (committee member).

Subjects/Keywords: dual-polarization radar; remote sensing; lightning; cloud physics

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APA (6^th Edition):

Basarab, B. M. (2015). Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/166859

Chicago Manual of Style (16^th Edition):

Basarab, Brett Michael. “Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables.” 2015. Masters Thesis, Colorado State University. Accessed March 06, 2021. http://hdl.handle.net/10217/166859.

MLA Handbook (7^th Edition):

Basarab, Brett Michael. “Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables.” 2015. Web. 06 Mar 2021.

Vancouver:

Basarab BM. Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables. [Internet] [Masters thesis]. Colorado State University; 2015. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/10217/166859.

Council of Science Editors:

Basarab BM. Prediction of total lightning in Colorado and Alabama thunderstorms based on storm dynamical and microphysical variables. [Masters Thesis]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/166859

Colorado State University

4. Tolstoy, Leonid. Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar.

Degree: PhD, Electrical and Computer Engineering, 2011, Colorado State University

URL: http://hdl.handle.net/10217/52112

► In recent years there has been a huge interest in the development and use of dual-polarized radar systems operating at X-band (~10 GHz) region of… (more)

▼ In recent years there has been a huge interest in the development and use of dual-polarized radar systems operating at X-band (~10 GHz) region of the electromagnetic spectrum. This is due to the fact that these systems are smaller and cheaper allowing for a network to be built, for example, for short range (typically < 30-40 km) hydrological applications. Such networks allow for higher cross-beam spatial resolutions while cheaper pedestals supporting a smaller antenna also allows for higher temporal resolution as compared with large S-band (long range) systems used by the National Weather Service. Dual-polarization radar techniques allow for correction of the strong attenuation of the electromagnetic radar signal due to rain at X-band and higher frequencies. However, practical attempts to develop reliable correction algorithms have been cumbered by the need to deal with the rather large statistical fluctuations or "noise" in the measured polarization parameters. Recently, the variational method was proposed, which overcomes this problem by using the forward model for polarization variables, and uses iterative approach to minimize the difference between modeled and observed values, in a least squares sense. This approach also allows for detection of hail and determination of the fraction of reflectivity due to the hail when the precipitation shaft is composed of a mixture of rain and hail. It was shown that this approach works well with S-band radar data. The purpose of this research is to extend the application of the variational method to the X-band dual-polarization radar data. The main objective is to correct for attenuation caused by rain mixed with wet ice hydrometeors (e.g., hail) in deep convection. The standard dual-polarization method of attenuation-correction using the differential propagation phase between H and V polarized waves cannot account for wet ice hydrometeors along the propagation path. The ultimate goal is to develop a feasible and robust variational-based algorithm for rain and hail attenuation correction for the Collaborate Adaptive Sensing of the Atmosphere (CASA) project. Advisors/Committee Members: Bringi, V. N. (advisor), Chandrasekar, V. (advisor), Notaros, B. (committee member), Kummerow, C. D. (committee member).

Subjects/Keywords: attenuation; correction; dual-polarization; radar; variational; X-band

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APA (6^th Edition):

Tolstoy, L. (2011). Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/52112

Chicago Manual of Style (16^th Edition):

Tolstoy, Leonid. “Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar.” 2011. Doctoral Dissertation, Colorado State University. Accessed March 06, 2021. http://hdl.handle.net/10217/52112.

MLA Handbook (7^th Edition):

Tolstoy, Leonid. “Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar.” 2011. Web. 06 Mar 2021.

Vancouver:

Tolstoy L. Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar. [Internet] [Doctoral dissertation]. Colorado State University; 2011. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/10217/52112.

Council of Science Editors:

Tolstoy L. Application of the variational method for correction of wet ice attenuation for X-band dual-polarized radar. [Doctoral Dissertation]. Colorado State University; 2011. Available from: http://hdl.handle.net/10217/52112

Penn State University

5. Naegele, Steven M. The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations.

Degree: 2018, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/14881svn5241

► Northeast winter cyclones (“nor'easters”) can produce snow bands that create large amounts of snow with the potential to economically cripple coastal cities. One uncertainty in… (more)

▼ Northeast winter cyclones (“nor'easters”) can produce snow bands that create large amounts of snow with the potential to economically cripple coastal cities. One uncertainty in snow band prediction is the parameterization of microphysical processes used in numerical models, including riming of ice particles. In the Thompson microphysics scheme, snow mass is converted to graupel mass when the riming growth rate exceeds the depositional growth rate, where the fraction of snow converted to graupel is related to the ratio of the two growth rates. Simulations of the 26-27 January 2015 nor'easter and its associated snow bands test the sensitivity of accumulated snowfall and storm structure to this parameterization using the Weather Research and Forecasting (WRF) model with five different treatments of riming efficiency in the Thompson microphysics scheme. With an altered riming efficiency, areal coverage of heaviest snowfall varies among the simulations. All simulations have similar radar reflectivity structures, orientations, and translation speeds in the main snow band, with slightly lower reflectivity values and different but comparable snow band translation speeds compared to radar observations. Differences in snow band characteristics and accumulated snowfall among the simulations and observations are diagnosed using thermodynamic profiles, radar variables, flow structures, and two-dimensional histograms of various WRF output variables, including potential temperature budget terms. Maps of differences in simulated accumulated snow between the original snow-graupel conversion efficiency in the Thompson microphysics scheme of WRF release 3.7.1 and updated efficiencies show generally increased differences with more aggressive snow-graupel conversion efficiency. One of the simulations with Thompson microphysics that converts snow to graupel more aggressively, THO_new, appears to have the accumulated snowfall distribution closest to observations. This is based on comparing the simulated snowfall maps mentioned above and interpolated observed snowfall maps. The overall changes in simulated snow accumulation and snow band structure indicate that the parameterization of riming efficiency in the Thompson microphysics scheme impacts numerical model simulations of where nor'easter snow bands produce snowfall, thus affecting forecast accuracy of snow bands and their precipitation. Advisors/Committee Members: Matthew Robert Kumjian, Thesis Advisor/Co-Advisor, David Jonathan Stensrud, Thesis Advisor/Co-Advisor, Jerry Y Harrington, Committee Member.

Subjects/Keywords: winter cyclone; nor'easter; snow band; snow; riming parameterization; microphysics; dual-polarization radar; Juno; radar; graupel

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APA (6^th Edition):

Naegele, S. M. (2018). The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14881svn5241

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):

Naegele, Steven M. “The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations.” 2018. Thesis, Penn State University. Accessed March 06, 2021. https://submit-etda.libraries.psu.edu/catalog/14881svn5241.

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

MLA Handbook (7^th Edition):

Naegele, Steven M. “The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations.” 2018. Web. 06 Mar 2021.

Vancouver:

Naegele SM. The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Mar 06]. Available from: https://submit-etda.libraries.psu.edu/catalog/14881svn5241.

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

Council of Science Editors:

Naegele SM. The 26-27 January Nor'easter (Juno): Radar Analysis and Simulated Sensitivity to Riming Parameterizations. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/14881svn5241

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

Colorado State University

6. Chen, Haonan. Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion.

Degree: PhD, Electrical and Computer Engineering, 2017, Colorado State University

URL: http://hdl.handle.net/10217/185786

► Rainfall estimation based on satellite measurements has proven to be very useful for various applications. A number of precipitation products at multiple time and space… (more)

▼ Rainfall estimation based on satellite measurements has proven to be very useful for various applications. A number of precipitation products at multiple time and space scales have been developed based on satellite observations. For example, the National Oceanic and Atmospheric Administration (NOAA) Climate Prediction Center has developed a morphing technique (i.e., CMORPH) to produce global precipitation products by combining existing space-based observations and retrievals. The CMORPH products are derived using infrared (IR) brightness temperature information observed by geostationary satellites and passive microwave-(PMW) based precipitation retrievals from low earth orbit satellites. Although space-based precipitation products provide an excellent tool for regional, local, and global hydrologic and climate studies as well as improved situational awareness for operational forecasts, their accuracy is limited due to restrictions of spatial and temporal sampling and the applied parametric retrieval algorithms, particularly for light precipitation or extreme events such as heavy rain. In contrast, ground-based radar is an excellent tool for quantitative precipitation estimation (QPE) at finer space-time scales compared to satellites. This is especially true after the implementation of dual-polarization upgrades and further enhancement by urban scale X-band radar networks. As a result, ground radars are often critical for local scale rainfall estimation and for enabling forecasters to issue severe weather watches and warnings. Ground-based radars are also used for validation of various space measurements and products. In this study, a new S-band dual-polarization radar rainfall algorithm (DROPS2.0) is developed that can be applied to the National Weather Service (NWS) operational Weather Surveillance Radar-1988 Doppler (WSR-88DP) network. In addition, a real-time high-resolution QPE system is developed for the Engineering Research Center for Collaborative Adaptive Sensing of the Atmosphere (CASA) Dallas-Fort Worth (DFW) dense radar network, which is deployed for urban hydrometeorological applications via high-resolution observations of the lower atmosphere. The CASA/DFW QPE system is based on the combination of a standard WSR-88DP (i.e., KFWS radar) and a high-resolution dual-polarization X-band radar network. The specific radar rainfall methodologies at Sand X-band frequencies, as well as the fusion methodology merging radar observations at different temporal resolutions are investigated. Comparisons between rainfall products from the DFW radar network and rainfall measurements from rain gauges are conducted for a large number of precipitation events over several years of operation, demonstrating the excellent performance of this urban QPE system. The real-time DFW QPE products are extensively used for flood warning operations and hydrological modelling. The high-resolution DFW QPE products also serve as a reliable dataset for validation of Global Precipitation Measurement (GPM) satellite precipitation products. This… Advisors/Committee Members: Chandrasekar, V. (advisor), Reising, Steven C. (committee member), Cheney, Margaret (committee member), Mielke, Paul W. (committee member).

Subjects/Keywords: machine learning; remote sensing; weather radar network; quantitative precipitation estimation (QPE); dual-polarization radar; satellite

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APA (6^th Edition):

Chen, H. (2017). Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/185786

Chicago Manual of Style (16^th Edition):

Chen, Haonan. “Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion.” 2017. Doctoral Dissertation, Colorado State University. Accessed March 06, 2021. http://hdl.handle.net/10217/185786.

MLA Handbook (7^th Edition):

Chen, Haonan. “Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion.” 2017. Web. 06 Mar 2021.

Vancouver:

Chen H. Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion. [Internet] [Doctoral dissertation]. Colorado State University; 2017. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/10217/185786.

Council of Science Editors:

Chen H. Radar and satellite observations of precipitation: space time variability, cross-validation, and fusion. [Doctoral Dissertation]. Colorado State University; 2017. Available from: http://hdl.handle.net/10217/185786

University of Oklahoma

7. Saeidi Manesh, Hadi. HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION.

Degree: PhD, 2019, University of Oklahoma

URL: http://hdl.handle.net/11244/319597

► There are interest and practical value in utilizing polarization diversity for a radar to obtain more target information or for a communication system to carry… (more)

▼ There are interest and practical value in utilizing polarization diversity for a radar to obtain more target information or for a communication system to carry more signal information without occupying more frequency band. This is because frequency bands are getting crowded in microwave frequencies due to the recent advancements in cellular communications. For example, the Spectrum Efficient National Surveillance Radar Program (SENSR) is started to study the feasibility of replacing the four radar networks that service the U.S with a single network of Multifunction Phased Array Radar (MPAR). Candidates being considered for future MPAR include Cylindrical Polarimetric Phased Array Radar (CPPAR), and Planar Polarimetric Phased Array Radar (PPPAR). To have the desired accurate weather measurements with a PPPAR or CPPAR, a high-performance phased array antenna with dual-polarization capability is required. The array antenna is required to possess matched main beams, high input isolation, and low cross-polarization level at broadside and scan angles up to 45◦. The beam mismatch should be within 5% of the beamwidth, the input isolation needs to be better than 40 dB, and to have ZDR bias of less than 0.2 dB, the cross-polarization level along beam axis needs to be lower than -20 dB and -40 dB for alternate and simultaneous transmission, respectively. These are very stringent requirements for antenna design and development. The primary objective of this dissertation is to propose high-performance dual-polarized antenna arrays with high input isolation and low cross-polarization level for multifunction phased radar application. To do so, four different types of dual-polarized microstrip patch antenna arrays are presented. In the proposed patch antennas, different feeding techniques such as, aperture coupling method, balanced feed method and the combination of these methods which is called hybrid feeding technique are used. The proposed antenna arrays in this dissertation are configured according to image configuration for improving the cross-polarization level. The issues and challenges of implementing image arrangement is discussed, and precise procedure for design and predicting the final array radiation characteristics is proposed. The CPPAR demonstrator antenna is redesigned to achieve matched horizontal and vertical polarization beam pointing angels. A method of beam matching between two linearly polarized radiation patterns of a dual-polarized frequency scanning antenna is proposed, implemented, and tested. A meticulous phase match process between the outputs of both individual cells and the whole corresponding horizontal and vertical feed lines is carried out. To verify the simulation results and to take the coupling effect into account, the radiation patterns of an isolated column, as well as those of three columns, are measured. In agreement with the design and simulation results, horizontal and vertical polarization beams with a pointing angle mismatch of less than ±0.2◦ within the resonant frequency… Advisors/Committee Members: Zhang, Guifu (advisor), Hong, Yang (committee member), Sigmarsson, Hjalti (committee member), Doviak, Richard (committee member), Zhang, Yan (committee member).

Subjects/Keywords: Engineering, Electronics and Electrical.; Dual Polarization; Antenna; Phased Array Radar; Microstrip Patch Antenna

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APA (6^th Edition):

Saeidi Manesh, H. (2019). HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319597

Chicago Manual of Style (16^th Edition):

Saeidi Manesh, Hadi. “HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION.” 2019. Doctoral Dissertation, University of Oklahoma. Accessed March 06, 2021. http://hdl.handle.net/11244/319597.

MLA Handbook (7^th Edition):

Saeidi Manesh, Hadi. “HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION.” 2019. Web. 06 Mar 2021.

Vancouver:

Saeidi Manesh H. HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION. [Internet] [Doctoral dissertation]. University of Oklahoma; 2019. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/11244/319597.

Council of Science Editors:

Saeidi Manesh H. HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION. [Doctoral Dissertation]. University of Oklahoma; 2019. Available from: http://hdl.handle.net/11244/319597

Penn State University

8. Banghoff, John. Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena.

Degree: 2019, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/16184jxb645

► Dual-polarization radar provides a wealth of new information about the type, size, and orientation of scatterers in the atmosphere. This radar information has been interrogated… (more)

Subjects/Keywords: Radar; Meteorology; Boundary Layer; Remote Sensing; Dual-Polarization Radar; Horizontal Convective Rolls; Cellular Convection; Clear-Air

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APA (6^th Edition):

Banghoff, J. (2019). Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16184jxb645

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):

Banghoff, John. “Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena.” 2019. Thesis, Penn State University. Accessed March 06, 2021. https://submit-etda.libraries.psu.edu/catalog/16184jxb645.

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

MLA Handbook (7^th Edition):

Banghoff, John. “Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena.” 2019. Web. 06 Mar 2021.

Vancouver:

Banghoff J. Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena. [Internet] [Thesis]. Penn State University; 2019. [cited 2021 Mar 06]. Available from: https://submit-etda.libraries.psu.edu/catalog/16184jxb645.

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

Council of Science Editors:

Banghoff J. Using Dual-Polarization Radar Information to Investigate Clear-Air Atmospheric Phenomena. [Thesis]. Penn State University; 2019. Available from: https://submit-etda.libraries.psu.edu/catalog/16184jxb645

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

University of Washington

9. Barnes, Hannah Cecile. The Microphysical Structure of Mesoscale Convective Systems.

Degree: PhD, 2016, University of Washington

URL: http://hdl.handle.net/1773/36484

► Mesoscale convective systems (MCSs) are large, long-duration complexes of clouds that are composed of a mixture of convective and stratiform components united by a mesoscale… (more)

▼ Mesoscale convective systems (MCSs) are large, long-duration complexes of clouds that are composed of a mixture of convective and stratiform components united by a mesoscale circulation. By developing an innovative spatial compositing technique that combines dual-polarimetric and Doppler radar data obtained during the Dynamics of the Madden-Julian Oscillation/ARM MJO Investigation Experiment (DYNAMO/AMIE), it is shown that hydrometeors are systematically organized around the mesoscale airflow patterns in MCSs in manner that is consistent with their known dynamical structure. Nine different hydrometeor types are identified by applying the National Center for Atmospheric Research (NCAR) particle identification (PID) algorithm to dual-polarimetric data obtained from the NCAR S-PolKa radar. The organization of these hydrometeors relative to airflow through MCSs is determined by simultaneously examining Doppler-radar-observed air motions and PID data. In convective cores, moderate rain occurs within the updraft core, where the rapidly rising air prevents hydrometeors from growing significantly. The heaviest rain and narrow, shallow regions of graupel/rimed aggregates are located just downstream of the updraft core, where the convective downdraft is likely located. Wet aggregates are located slightly further downstream from the updraft core in a narrow layer just below the 0°C layer, where the vertical velocities are likely less intense. The upper-levels of the convective core, where there is a lot of turbulence, are dominated by dry aggregates. Small ice crystals are located along the cloud edges. Within the stratiform region the rain intensity systematically decreases with distance from the center of the storm. Descending from cloud top small ice crystals, dry aggregates, and wet aggregates are sequentially layered in a manner consistent with the gradual gravitational setting observed in the upper portions of the stratiform region. Additionally, pockets of graupel/rimed aggregates are occasionally observed just above the wet aggregate layer. It is suggested that these graupel/rimed aggregates could result from localized wind-shear-induced turbulence, previous convective cells, and/or small, embedded convective cells. While previous studies have found evidence of these spatial hydrometeor patterns, this dissertation is the first to analyze Doppler-radar-observe air motions simultaneously with the PID data and show that these are patterns are systematically organized with respect to the mesoscale circulation of MCSs. Thus, this work builds upon a 50 year tradition of using the latest radar technology to advance our understanding of the fundamental nature of tropical oceanic MCS. While the PID is traditionally interpreted as an indication of the dominant hydrometeor type within a volume of air sampled by a radar, this dissertation takes advantage of the fact that the frozen hydrometeors identified by the PID methodology can be interpreted in terms of the microphysical processes producing the ice particles. Using this… Advisors/Committee Members: Houze, Robert A (advisor).

Subjects/Keywords: Dual-Polarization Radar; Hydrometeors; Mesoscale Convective Systems; Microphysical Processes; Tropical Convection; Tropical Meteorology; Atmospheric sciences; Meteorology; atmospheric sciences

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APA (6^th Edition):

Barnes, H. C. (2016). The Microphysical Structure of Mesoscale Convective Systems. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/36484

Chicago Manual of Style (16^th Edition):

Barnes, Hannah Cecile. “The Microphysical Structure of Mesoscale Convective Systems.” 2016. Doctoral Dissertation, University of Washington. Accessed March 06, 2021. http://hdl.handle.net/1773/36484.

MLA Handbook (7^th Edition):

Barnes, Hannah Cecile. “The Microphysical Structure of Mesoscale Convective Systems.” 2016. Web. 06 Mar 2021.

Vancouver:

Barnes HC. The Microphysical Structure of Mesoscale Convective Systems. [Internet] [Doctoral dissertation]. University of Washington; 2016. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/1773/36484.

Council of Science Editors:

Barnes HC. The Microphysical Structure of Mesoscale Convective Systems. [Doctoral Dissertation]. University of Washington; 2016. Available from: http://hdl.handle.net/1773/36484

University of Iowa

10. Mishra, Kumar Vijay. Compressed sensing applied to weather radar.

Degree: PhD, Electrical and Computer Engineering, 2015, University of Iowa

URL: https://ir.uiowa.edu/etd/1885

► Over the last two decades, dual-polarimetric weather radar has proven to be a valuable instrument providing critical precipitation information through remote sensing of the… (more)

Subjects/Keywords: publicabstract; compressed sensing; dual-polarization; Iowa XPOLs; matrix completion; sparsity; weather radar; Electrical and Computer Engineering

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APA (6^th Edition):

Mishra, K. V. (2015). Compressed sensing applied to weather radar. (Doctoral Dissertation). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/1885

Chicago Manual of Style (16^th Edition):

Mishra, Kumar Vijay. “Compressed sensing applied to weather radar.” 2015. Doctoral Dissertation, University of Iowa. Accessed March 06, 2021. https://ir.uiowa.edu/etd/1885.

MLA Handbook (7^th Edition):

Mishra, Kumar Vijay. “Compressed sensing applied to weather radar.” 2015. Web. 06 Mar 2021.

Vancouver:

Mishra KV. Compressed sensing applied to weather radar. [Internet] [Doctoral dissertation]. University of Iowa; 2015. [cited 2021 Mar 06]. Available from: https://ir.uiowa.edu/etd/1885.

Council of Science Editors:

Mishra KV. Compressed sensing applied to weather radar. [Doctoral Dissertation]. University of Iowa; 2015. Available from: https://ir.uiowa.edu/etd/1885

Georgia Tech

11. Reed, Jenny Lynn. Theoretical performance bounds for the estimation of drop size distribution and rain rate.

Degree: PhD, Electrical and Computer Engineering, 2016, Georgia Tech

URL: http://hdl.handle.net/1853/56286

► Radar is an indispensable tool in the observation, analysis, and prediction of weather. The Weather Surveillance Radar 1988-Doppler (WSR-88D) is the primary source of weather… (more)

Subjects/Keywords: Radar; Weather; Meteorology; Drop size distribution; Dual-polarization; Rain rate; Cramer-Rao lower bound; Variance bounds; Maximum likelihood

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APA (6^th Edition):

Reed, J. L. (2016). Theoretical performance bounds for the estimation of drop size distribution and rain rate. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/56286

Chicago Manual of Style (16^th Edition):

Reed, Jenny Lynn. “Theoretical performance bounds for the estimation of drop size distribution and rain rate.” 2016. Doctoral Dissertation, Georgia Tech. Accessed March 06, 2021. http://hdl.handle.net/1853/56286.

MLA Handbook (7^th Edition):

Reed, Jenny Lynn. “Theoretical performance bounds for the estimation of drop size distribution and rain rate.” 2016. Web. 06 Mar 2021.

Vancouver:

Reed JL. Theoretical performance bounds for the estimation of drop size distribution and rain rate. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/1853/56286.

Council of Science Editors:

Reed JL. Theoretical performance bounds for the estimation of drop size distribution and rain rate. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/56286

12. Vilardell Sanchez, Jezabel. The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements.

Degree: University of Massachusetts

URL: https://scholarworks.umass.edu/masters_theses_2/805

► Ground-based radars are instruments commonly used to surveil the precipitation climate of the surrounding areas. Weather events are characterized by collecting backscatter data and… (more)

Subjects/Keywords: radar; weather; ldr; dual-polarization; Electrical and Electronics; Electromagnetics and Photonics; Signal Processing

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APA (6^th Edition):

Vilardell Sanchez, J. (n.d.). The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements. (Thesis). University of Massachusetts. Retrieved from https://scholarworks.umass.edu/masters_theses_2/805

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vilardell Sanchez, Jezabel. “The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements.” Thesis, University of Massachusetts. Accessed March 06, 2021. https://scholarworks.umass.edu/masters_theses_2/805.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vilardell Sanchez, Jezabel. “The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements.” Web. 06 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Vilardell Sanchez J. The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements. [Internet] [Thesis]. University of Massachusetts; [cited 2021 Mar 06]. Available from: https://scholarworks.umass.edu/masters_theses_2/805.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Vilardell Sanchez J. The UMass Experimental X-Band Radar (UMAXX): An Upgrade of the CASA MA-1 to Support Cross-Polarization Measurements. [Thesis]. University of Massachusetts; Available from: https://scholarworks.umass.edu/masters_theses_2/805

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

13. Trembinski, Richard. The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice .

Degree: 2018, University of Ottawa

URL: http://hdl.handle.net/10393/38602

► Current marine navigation radars are capable of high-resolution imagery of marine ice but are not able to classify the marine ice. Classifying marine ice means… (more)

▼ Current marine navigation radars are capable of high-resolution imagery of marine ice but are not able to classify the marine ice. Classifying marine ice means identifying the ice as first-year ice, multi-year ice or glacier ice. The latter two ice types are as hard as concrete and capable of damaging even ice hardened vessels such as icebreakers. The Canadian Coast Guard has identified the ability of marine navigation radars to classify marine ice as the single greatest improvement to be made in the safety of Arctic navigation. This thesis presents new research that improves our understanding of electromagnetic backscatter from marine ice. The goal of this work was two-fold: to demonstrate the feasibility of using commercial computational electromagnetic modelling software to simulate real-world marine ice targets, and to identify an optimum frequency or range of frequencies at which the marine ice targets can be definitively classified. Engineering models for scattering from electrically large objects made of a highly variable, complex, heterogenous, three-phase mixture of ice, air and brine are developed. To do so, an extensive literature review of the Arctic environment, and the physical and electrical properties of marine ice, is conducted to distill the required geophysical parameters of the three marine ice types of interest in this work. Using well-established dielectric mixing theory, these parameters are applied to homogenize the marine ice and model the target (in the presence of a flat sea halfspace) using a surface integral equation formulation. To reduce the computational resources required to numerically solve the integral equation models using the method of moments, computational electromagnetic modelling studies are conducted to select a suitable seawater halfspace representation and determine if the properties of larger objects can be inferred from scaled down models of the object. A case study is presented for backscatter from marine ice from 6 to 10 GHz, which explores the effects of frequency on the co- and cross-polarized backscatter intensity (and hence the apparent radar cross-section) of the three marine ice types of interest. Good agreement is found between the co- and cross-polarized backscatter intensity responses found from the engineering model computations and some existing experimental data from real-world marine ice targets. This work: (a) proves the feasibility of using computational electromagnetic modelling to simulate real-world marine ice targets, providing a new, cost-effective method for the study of backscatter from marine ice; (b) confirms the viability of using cross-polarization as a method of classification; and (c) identifies 10 to 16 GHz as a potential optimal frequency range for the classification of marine ice using dual-polarization radar.

Subjects/Keywords: Computational Electromagnetics; Modelling; Marine Ice; Backscatter; Radar Cross-Section; Dual-polarization

…Demonstrated that dual polarization radar has the potential to be used to classify marine ice as… …suggests the optimal frequency for ice classification using dual polarization radar exists… …polarization respectively . . . . . . 46 3.15 Plots of the normalized, co-polarized radar signature… …This research has been limited to modifying these existing radars to use dual-polarization… …processing, whereas the Sea-Hawk uses dual polarization. These enhanced marine radars provide a…

11 more images…

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APA (6^th Edition):

Trembinski, R. (2018). The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/38602

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):

Trembinski, Richard. “The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice .” 2018. Thesis, University of Ottawa. Accessed March 06, 2021. http://hdl.handle.net/10393/38602.

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

MLA Handbook (7^th Edition):

Trembinski, Richard. “The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice .” 2018. Web. 06 Mar 2021.

Vancouver:

Trembinski R. The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice . [Internet] [Thesis]. University of Ottawa; 2018. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/10393/38602.

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

Council of Science Editors:

Trembinski R. The Feasibility of Using Computational Electromagnetic Modelling for the Study of Backscatter from Marine Ice . [Thesis]. University of Ottawa; 2018. Available from: http://hdl.handle.net/10393/38602

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

The Ohio State University

14. Lee, Kwan-Ho. Development of four novel UWB antennas assisted by FDTD method.

Degree: PhD, Electrical Engineering, 2005, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1103659688

► Due to high demand for wide bandwidth applications, UWB antennas have received significant attention in many commercial and military application areas. They can provide very… (more)

Subjects/Keywords: UWB; Antennas; FDTD; Modeling; Dual Polarization; impedance matching; dilectric horn antenna; ground penetrating radar; nea field probe; Tepered Chamber

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

APA (6^th Edition):

Lee, K. (2005). Development of four novel UWB antennas assisted by FDTD method. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1103659688

Chicago Manual of Style (16^th Edition):

Lee, Kwan-Ho. “Development of four novel UWB antennas assisted by FDTD method.” 2005. Doctoral Dissertation, The Ohio State University. Accessed March 06, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1103659688.

MLA Handbook (7^th Edition):

Lee, Kwan-Ho. “Development of four novel UWB antennas assisted by FDTD method.” 2005. Web. 06 Mar 2021.

Vancouver:

Lee K. Development of four novel UWB antennas assisted by FDTD method. [Internet] [Doctoral dissertation]. The Ohio State University; 2005. [cited 2021 Mar 06]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1103659688.

Council of Science Editors:

Lee K. Development of four novel UWB antennas assisted by FDTD method. [Doctoral Dissertation]. The Ohio State University; 2005. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1103659688

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Open Access Theses and Dissertations