Mathematics – Logic
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sci...193..809m&link_type=abstract
Science, vol. 193, Aug. 27, 1976, p. 809-812.
Mathematics
Logic
7
Landing Sites, Mars Landing, Viking Lander 1, Viking Mars Program, Ground Stations, Mars Photographs, Mars Surface Samples, Radar Data, Viking Orbiter Spacecraft
Scientific paper
During the past several years the Viking project developed plans to use Viking orbiter instruments and earth-based radar to certify the suitability of the landing sites selected as the safest and most scientifically rewarding using Mariner 9 data. During June and July 1976, the earth-based radar and orbital spacecraft observations of some of the prime and backup sites were completed. The results of these combined observations indicated that the Viking 1 prime landing area in the Chryse region of Mars is geologically varied and possibly more hazardous than expected, and was not certifiable as a site for the Viking 1 landing. Consequently, the site certification effort had to be drastically modified and lengthened to search for a site that might be safe enough to attempt to land. The selected site considered at 47.5 deg W, 22.4 deg N represented a compromise between desirable characteristics observed with visual images and those inferred from earth-based radar. It lies in the Chryse region about 900 kilometers northwest of the original site.
Crabill N. L.
Masursky Harold
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