Trajectory control for the Agency's deep-space missions

Details Trajectory control for the Agency's deep-space missions Trajectory control for the Agency's deep-space missions

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esabu..40...30r&link_type=abstract

ESA Bulletin (ISSN 0376-4265), no. 40, Nov. 1984, p. 30-37.

Other

Deep Space Network, European Space Programs, Interplanetary Trajectories, Mission Planning, Trajectory Control, Computer Programs, Giotto Mission, Ulysses Mission

Scientific paper

The software system developed at ESOC to control the hydrazine-blowdown trajectory-correction thrusters of the ESA Giotto and ESA/NASA Ulysses spacecraft is briefly characterized. The requirements of the Giotto mission to Halley's comet and the Ulysses mission to the polar regions of the sun are reviewed; the basic principles of trajectory correction for spin-stabilized spacecraft are explained; the need to determine all maneuver parameters for optimal multiburn trajectory-correction strategies is indicated; and the mathematical algorithms (based on full-precision numerical integration of the equations of motion) are outlined. Diagrams, drawings, and a flow chart are provided, and the applicability of the software concept to other deep-space missions or to the next generation of geocentric-trajectory control systems is discussed.

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