Computer Science – Sound
Scientific paper
Apr 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972moon....4..113b&link_type=abstract
The Moon, Volume 4, Issue 1-2, pp. 113-127
Computer Science
Sound
2
Scientific paper
The Apollo Lunar Sounder Experiment that is scheduled to orbit the Moon on Apollo 17 consists of a three frequency coherent radar system and an optical recorder. The coherent radar can be used to measure both phase and amplitude characteristics of the radar echo. Measurement methods that are related to the phase and amplitude will be used to determine the surface profile, locate subsurface features and ascertain near surface electrical properties of the lunar surface. The key to the coherent radar measurement is a highly stable oscillator that preserves an accurate phase reference (2 or 3 electrical degrees) over a long period of time. This reference provides a means for reducing surface clutter so that subsurface features are more easily detected and also provides a means of measuring range to the surface to within a fraction of a wavelength.
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