Physics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.2241s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, Dec. 1991, p. 2241-2244.
Physics
4
Bidirectional Reflectance, Earth Surface, Light Scattering, Playas, Spectral Reflectance, Atmospheric Effects, Infrared Reflection, Optical Reflection, Planetary Surfaces, Spectroradiometers
Scientific paper
Bidirectional reflectance data obtained with the Portable Apparatus for Rapid Acquisition of Bidirectional Observations of Land and Atmosphere instrument at Lunar Lake, Nevada, were analyzed to determine the scattering properties of playas. The data are approximated by a Lambertian function, except at high phase angles in the solar principal plane, where Fresnel reflectance appears to dominate. The data also depart slightly (15 percent) from a Lambertian function at high emission angles in all azimuthal planes. No published photometric model accounts for the observed data. It is hypothesized that the observed scattering behavior is the superposition of volume and surface (Fresnel) scattering mechanisms.
Arvidson Raymond E.
Deering Donald W.
Guinness Edward A.
Shepard Michael K.
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