Other
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pggp.rept..456c&link_type=abstract
In NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984 p 456-457 (SEE N85-23474 13-91)
Other
Geometric Rectification (Imagery), Lunar Geology, Radar Imagery, Topography, Infrared Imagery, Radar Geology, Surface Roughness, Terrain Analysis
Scientific paper
Earth based radar observations of the Moon have been taken at many wavelengths during the last ten years -- at 3.8, 70 cm, and most recently, 7.5 cm. Radar returns have been collected in both polarized and depolarized form so that is possible to derive both topographic and local surface roughness from the data. Until recently, work with 3.8 cm radar data had consisted of qualitative correlation of photographic and thermal IR data with individual depolarized radar data frames (local surface roughness) at different wavelengths. These studies provided results which demonstrated that the relationships between surface roughness (measured by either thermal emission or radar reflectivity) at different wavelengths can be used as an index of a crater's state of degradation (age). However, systematic studies of craters, or other local terrain features, as well as regional or global studies of major terrains (involving a number of data frames), cannot be done until individual frames are calibrated, geometric distortion is removed, and corrected frames are mosaicked.
Clark Pamela E.
Thompson William T.
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