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Rochester Institute of Technology

1. Ambeau, Brittany L. Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density.

Degree: PhD, Chester F. Carlson Center for Imaging Science (COS), 2017, Rochester Institute of Technology

Bulk density is an important geophysical property that impacts the mobility of military vehicles and personnel. Accurate retrieval of bulk density from remotely sensed data is, therefore, needed to estimate the mobility on "off-road" terrain. For a particulate surface, the functional form of the opposition effect can provide valuable information about composition and structure. In this research, we examine the relationship between bulk density and angular width of the opposition effect for a controlled set of laboratory experiments. Given a sample with a known bulk density, we collect reflectance measurements on a spherical grid for various illumination and view geometries — increasing the amount of reflectance measurements collected at small phase angles near the opposition direction. Bulk densities are varied using a custom-made pluviation device, samples are measured using the Goniometer of the Rochester Institute of Technology-Two (GRIT-T), and observations are fit to the Hapke model using a grid-search method. The method that is selected allows for the direct estimation of five parameters: the single-scattering albedo, the amplitude of the opposition effect, the angular width of the opposition effect, and the two parameters that describe the single-particle phase function. As a test of the Hapke model, the retrieved bulk densities are compared to the known bulk densities. Results show that with an increase in the availability of multi-angular reflectance measurements, the prospects for retrieving the spatial distribution of bulk density from satellite and airborne sensors are imminent. Advisors/Committee Members: Charles Bachmann, David Ross, David Messinger.

Subjects/Keywords: None provided

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

APA (6th Edition):

Ambeau, B. L. (2017). Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density. (Doctoral Dissertation). Rochester Institute of Technology. Retrieved from http://scholarworks.rit.edu/theses/9594

Chicago Manual of Style (16th Edition):

Ambeau, Brittany L. “Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density.” 2017. Doctoral Dissertation, Rochester Institute of Technology. Accessed November 24, 2017. http://scholarworks.rit.edu/theses/9594.

MLA Handbook (7th Edition):

Ambeau, Brittany L. “Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density.” 2017. Web. 24 Nov 2017.

Vancouver:

Ambeau BL. Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density. [Internet] [Doctoral dissertation]. Rochester Institute of Technology; 2017. [cited 2017 Nov 24]. Available from: http://scholarworks.rit.edu/theses/9594.

Council of Science Editors:

Ambeau BL. Using the Opposition Effect in Remotely Sensed Data to Assist in the Retrieval of Bulk Density. [Doctoral Dissertation]. Rochester Institute of Technology; 2017. Available from: http://scholarworks.rit.edu/theses/9594

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