Galileo orbit determination for the Venus and Earth-1 flybys

Details Galileo orbit determination for the Venus and Earth-1 flybys Galileo orbit determination for the Venus and Earth-1 flybys

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992asdy.conf.1013k&link_type=abstract

IN: Astrodynamics 1991; Proceedings of the AAS/AIAA Astrodynamics Conference, Durango, CO, Aug. 19-22, 1991. Pt. 2 (A92-43251 18

Astronomy and Astrophysics

Astronomy

Earth-Venus Trajectories, Flyby Missions, Galileo Spacecraft, Orbit Calculation, Space Navigation, Spacecraft Orbits, Gravitational Effects, Radiation Pressure, Solar Radiation, Trajectory Control

Scientific paper

This paper presents the orbit determination strategy and results in navigating the Galileo spacecraft from launch through its Venus and first earth flybys. Many nongravitational effects were estimated, including solar radiation pressure, small velocity impulses from attitude changes and eight trajectory correction maneuvers. Tracking data consisted of S-Band Doppler and range. The fitting of Doppler was difficult since one of the cpacecraft's two antennas was offset from the spin axis, thus producing the sinusoidal velocity fluctuation seen in the data. Finally, Delta Differential One-way Range data was used during the last three months of the earth approach to help deliver the spacecraft to within desired accuracy.

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