Pioneer Saturn celestial mechanics experiment

Details Pioneer Saturn celestial mechanics experiment Pioneer Saturn celestial mechanics experiment

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980sci...207..449a&link_type=abstract

Science, vol. 207, Jan. 25, 1980, p. 449-453. Research supported by the California Institute of Technology;

Physics

12

Celestial Mechanics, Gravitational Effects, Pioneer Space Probes, Planetary Gravitation, Saturn Rings, Spaceborne Experiments, Atmospheric Composition, Doppler Effect, Natural Satellites, Saturn Atmosphere, Saturn, Pioneer 11, Celestial Mechanics, S Bands, Analysis, Data, Doppler Effect, Gravitational Moments, Satellites, Mass, Density, Ice, Rings, Composition, Interior, Cores, Water, Ammonia, Models, Methane, Helium, Radius, Gravitational Fields, Procedure, Harmonics

Scientific paper

The paper investigates a continuous round-trip radio link at S band (2.2 GHz) that was maintained during the Pioneer Saturn encounter between stations of the Deep Space Network and the spacecraft. From an analysis of the Doppler shift in the radio carrier frequency, a number of gravitational effects on the trajectory were determined. Gravitational moments for Saturn were found from a preliminary analysis, as well as mass values for the Saturn satellites Rhea, Iapetus, and Titan. It was determined that the densities of all three satellites are low and consistent with the compositions of ices. Theoretical calculations for the Saturn interior are described which use the latest observational data, including Pioneer Saturn and state-of-the-art physics for the internal composition.

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