Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pggp.rept..282c&link_type=abstract
In NASA. Washington Rept. of Planetary Geology Program, 1983 p 282-283 (SEE N84-23431 13-91)
Physics
Geometric Rectification (Imagery), Lunar Geology, Radar Imagery, Topography, Infrared Imagery, Radar Geology, Surface Roughness, Terrain Analysis
Scientific paper
Several 3.8 cm radar frames were calibrated empirically by histogram fitting, because no instrument background data is available. Then data were corrected for geometric distortion by: (1) redetermining position of individual frames using most accurate recent lunar ephemerides; (2) reprojecting frames into simple cylindrical map projection; (3) using most recent catalog of lunar craters to determine the exact positions of features identifiable on radar frames; and (4) correcting for apparent distortion (misplacement of features in frames) by resampling using a different bilinear interpolation derived for each of the parallelopideds of the set defined for each frame. A hardcopy set of corrected frames was produced. Attempts to produce a mosaic of such corrected frames continue. The resulting mosaic can be used to show the systematic relationship between photographic thermal IR and radar data at different wavelengths in a region dominated by both mare and highland terrain.
Clark Pamela E.
Thompson William T.
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