Magellan orbits Venus

Details Magellan orbits Venus Magellan orbits Venus

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spfl...32..334m&link_type=abstract

Spaceflight (ISSN 0038-6340), vol. 32, Oct. 1990, p. 334-337.

Physics

Magellan Project (Nasa), Magellan Spacecraft (Nasa), Spacecraft Communication, Venus Probes, Deep Space Network, Onboard Data Processing, Spacecraft Orbits

Scientific paper

Various events surrounding Magellan's orbit of Venus are recounted. Significant events include the successful firing of a solid rocket motor while the spacecraft was behind Venus to transfer it from a solar-centered trajectory to an orbit around the planet. The spacecraft orbits Venus every 3.26 hours at a maximum altitude of 8500 km and minimum altitude of 291 km in an elliptical orbit. The successful August 16 test of the synthetic-aperture radar system is discussed, noting that it produced two strips, each about 20 km x 16,000 km, revealing details as small as 120 m. Two anomalies causing a delay in the start of mapping operations and subsequent breaks in the communication link with earth for 14.5 hours and 17.7 hours are discussed. Protective measures directed from the spacecraft's ROM during breach of contact are listed, and possible causes of the anomalies are suggested, such as solar activity or hardware or software elements, although the actual cause is not yet known.

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