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The geological interpretation of photometric surface roughnessA computer-generated km-scale relief map, whose topographic facets on scales of less than a few m are assumed to have smooth particulate surfaces, is the basis of the present investigation of the relationship between photometrically-derived values of Hapke's (1984) roughness parameter theta and topographic scale. The addition of m-km scale-range relief to the otherwise smooth surface alters integral photometric behavior in a way that is consistent with Hapke's equation; the roughness characterized by theta is an integral property over all scales up to the resolution limit of the photometric data used in its determination. With sufficient phase angle coverage, theta can distinguish terrains with very different integral roughnesses.
Document ID
19880043202
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Helfenstein, Paul
(Brown University Providence, RI; Cornell University, Ithaca, NY, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1988
Publication Information
Publication: Icarus
ISSN: 0019-1035
Subject Category
Lunar And Planetary Exploration
Accession Number
88A30429
Funding Number(s)
CONTRACT_GRANT: NAGW-137
CONTRACT_GRANT: NSG-7606
Distribution Limits
Public
Copyright
Other

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