Computer Science – Sound
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phdt........83c&link_type=abstract
Thesis (PH.D.)--THE UNIVERSITY OF TEXAS AT DALLAS, 1992.Source: Dissertation Abstracts International, Volume: 53-11, Section: B,
Computer Science
Sound
9
Regolith, Resource Exploration
Scientific paper
Ground-penetrating radar is a potential method for detecting subsurface gas reservoirs on the Moon. If such reservoirs can be found and exploited, the potential payback could make a lunar base into a self-supporting entity. Subsurface volatiles reservoirs are shown to be possible, and their economic value may be significant. However, the ability to remotely detect such subsurface structures on the Moon is an important issue when considering their potential usefulness. The Apollo Lunar Sounder Experiment (ALSE), results suggested that subsurface structures could be detected from lunar orbit using ground-penetrating radar at frequencies from 5 Mhz to 150 Mhz. Thus the usefulness of ground-penetrating radar on the moon is seen to extend beyond pure scientific research, to resource exploration. A method has been developed for extracting profiles from the optical format of the ALSE data. A method has also been developed to perform a multiple-orbit correlation on those profiles to eliminate reflections due to off-nadir surface returns in mare regions. This technique was used to (a) partially confirm previous interpretations of subsurface structures in Mare Serenitatis and (b) detect other possible subsurface structures in previously unexamined areas. The newly-developed method has been used to study Oceanus Procellarum. A subsurface horizon has been detected in the subsurface below the mare, and a geological interpretation of this horizon has been done which provides evidence in favor of the graben origin hypothesis, as opposed to the gargantuan -impact hypothesis. A method has also been developed which appears capable of filtering out off-nadir surface noise from highland area profiles, so that subsurface features may now be detected in highlands areas as well as mare areas. These results show that the newly-developed procedure is a useful tool for studying the subsurface of the Moon. Finally, a concept for microwave heating of regolith for extraction of lunar volatiles is presented. Promising results would warrant experimentation on actual lunar regolith samples.
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