Mathematics – Logic
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992bupr.rept......&link_type=abstract
Final Report, 15 Sep. 1989 - 14 Jun. 1992 Brown Univ., Providence, RI. Dept. of Geological Sciences.
Mathematics
Logic
Image Analysis, Mars Surface, Phobos, Planetary Geology, Planetary Mapping, Remote Sensing, Satellite Surfaces, Space Missions, Surface Properties, Topography, High Resolution, Imaging Spectrometers, Radiometers, Spectral Reflectance, Spectrum Analysis, Television Cameras, Ultraviolet Spectrometers
Scientific paper
Data was acquired from VSK (2 wide-angle visible-NIR TV cameras at 0.4 to 0.6 micrometers and 0.8 to 1.1 micrometers, and a narrow-angle TV camera), KRFM (10-band UV-visible spectrometer at 0.3 to 0.6 micrometers and a 6-band radiometer at 5-50 micrometers), and ISM (a 128-channel NIR imaging spectrometer at 0.8 to 3 micrometers). These data provided improved mapping coverage of Phobos; improved mass, shape, and volume determinations, with the density shown to be lower than that of all known meteorites, suggesting a porous interior; evidence for a physically, spectrally and possibly compositionally heterogeneous surface; and proof that the spectral properties do not closely resemble those of unaltered carbonaceous chondrites, but show more resemblance to the spectra of altered mafic material. For Mars, the data show that the underlying rock type can be distinguished through the global dust cover; that the spectral properties and possibly composition vary laterally between and within the geologic provinces; that the surface physical properties vary laterally, and in many cases, the boundaries coincide with those of the geologic units; and the acquired data also demonstrate the value of reflectance spectroscopy and radiometry to the study of Martian geology.
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