Mathematics – Logic
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nvmi.conf...20b&link_type=abstract
Workshop on New Views of the Moon: Integrated Remotely Sensed, Geophysical, and Sample Datasets, p. 20
Mathematics
Logic
Chemical Composition, Lunar Soil, Mineralogy, Minerals, Soils, Lunar Resources, Lunar Surface, Calibrating, Ground Truth, Planetary Crusts, Remote Sensing, X Ray Fluorescence, Lunar Landing Sites
Scientific paper
Lunar soil, i.e., the fine fraction of the lunar regolith, is the ground truth available for calibrating remotely sensed properties of virtually atmosphere-free planetary bodies. Such properties include albedo, IR-VIS-UV spectra, and secondary XRF, which are used to characterize the chemical and mineralogical compositions of planetary crusts. The quality of calibration, however, is dependent on the degree to which the ground truth is represented in the remotely sensed properties. The footprints and spatial resolution of orbital and Earth-based observations are much larger than the sampling areas at the landing sites. Yet an average composition of soils at each landing site is our best approximation for testing calibration. Previously, we have compiled chemical compositions of lunar soils and estimated the best average composition (CC) for each landing site. We have now compiled and estimated the best average mineralogical composition (MC) of soils (9 150-p n fraction) at each Apollo landing site. In this paper, we examine how these two estimates (Tables 1 and 2) compare and how representative they may be. For the purpose of comparison, we have calculated the normative mineralogy of each site (from Table 1) and recast them on a quartz-apatite-pyrite-free basis, i.e., in terms of feldspar, pyroxene, olivine, and ilmenite + chromite (Table 3).
Basu Abhijit
Riegsecker Sue E.
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