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A Study of the Opposition Phase Curve in Low Albedo MediaThe Opposition Effect, the pronounced non-linear intensity increase in the reflectance phase curve with decreasing phase angle,theta , has long been observed in solar system bodies and in laboratory investigations of the angular scattering properties of particulate media. The size and shape of the phase curve, and the change in linear polarization with theta, have been related to the physical properties of planetary regolith scattering materials. Near zero degrees the increase in reflectance with decreasing phase angle has been attributed to two distinct processes. The first is the elimination of shadows cast between the regolith grains as the phase angle decreases. This is called the shadow hiding opposition effect (SHOE). The second is coherent constructive interference between rays of light traveling along identical but opposite paths in multiply scattering media. This is called the coherent backscattering opposition effect (CBOE).
Document ID
20030111128
Document Type
Conference Paper
Authors
Nelson, R. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hapke, B. W. (Pittsburgh Univ. Pittsburgh, PA, United States)
Smythe, W. D. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hale, A. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Piatek, J. L. (Pittsburgh Univ. Pittsburgh, PA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Distribution Limits
Public
Copyright
Public Use Permitted.

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