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Far‐Ultraviolet Photometric Response of Apollo Soil 10084
Author(s) -
Raut U.,
Karnes P. L.,
Retherford K. D.,
Davis M. W.,
Liu Y.,
Gladstone G. R.,
Patrick E. L.,
Greathouse Thomas K.,
Hendrix A. R.,
Mokashi P.
Publication year - 2018
Publication title -
journal of geophysical research: planets
Language(s) - English
Resource type - Journals
eISSN - 2169-9100
pISSN - 2169-9097
DOI - 10.1029/2018je005567
Subject(s) - geometric albedo , albedo (alchemy) , ultraviolet , regolith , spectrograph , lunar soil , space weathering , scattering , physics , wavelength , optics , remote sensing , reflectivity , environmental science , astronomy , geology , photometry (optics) , spectral line , stars , art , performance art , art history
We report new measurements of the far‐ultraviolet (FUV) bidirectional reflectance of Apollo soil 10084 from the Southwest Research Institute ultraviolet reflectance chamber. The bidirectional reflectance distribution function of this mare soil, enriched in Ti and Fe content, is rather featureless in the FUV wavelength region of 115–180 nm, except for a small blue slope, which is attributed to the effects of space weathering. This soil preferentially backscatters FUV photons as indicated by the angular distribution of the bidirectional reflectance. The phase curves are fitted with a simplified Hapke photometric model to derive the average volume single scattering albedo and scattering phase function of the mare lunar grains. The albedo values and the backscattering nature reported here are consistent with Lunar Reconnaissance Orbiter's Lyman‐Alpha Mapping Project ultraviolet imaging spectrograph observations, despite expected morphological differences.