Using lunar sounder imagery to distinguish surface from subsurface reflectors in lunar highlands areas

Details Using lunar sounder imagery to distinguish surface from subsurface reflectors in lunar highlands areas Using lunar sounder imagery to distinguish surface from subsurface reflectors in lunar highlands areas

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..333c&link_type=abstract

In its Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 333-334 (SEE N94-12015 01-91)

Computer Science

Sound

Apollo 17 Flight, Highlands, Lunar Maria, Lunar Surface, Noise Reduction, Radar Imagery, Reflectors, Topography, Craters, Depth, Echoes, Image Processing, Pixels

Scientific paper

We have developed a method using the Apollo 17 Lunar Sounder imagery data which appears capable of filtering out off-nadir surface noise from highland area profiles, so that subsurface features may now be detected in highland areas as well as mare areas. Previously, this had been impossible because the rough topography in the highland areas created noise in the profiles which could not be distinguished from subsurface echoes. The new method is an image processing procedure involving the computerized selection of pixels which represent intermediate echo intensity values, then manually removing those pixels from the profile. Using this technique, a subsurface feature with a horizontal extent of about 150 km, at a calculated depth of approximately 3 km, has been detected beneath the crater Riccioli in the highlands near Oceanus Procellarum. This result shows that the ALSE data contain much useful information that remains to be extracted and used.

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