The plan to launch an Engineering Test Satellite, the ETS-6, in 1993 is reported. The operation involves a three stage apogee maneuver that will move the ETS-6 from an elliptical transfer orbit to a near synchronous orbit. The move is powered by liquid fuel. The apogee maneuver is split into three stages, in order to compensate for magnitude and direction of thurst error. An important aspect of the operation is that apogee engine firing execution commands will be sent from the station. The final orbit achieved by the steps should put the ETS-6 into the optical acquisition range defined by a combination of deviations in satellite longitude: apogee height and orbital plane. Injection strategies for nominal and backup cases, plus the optimal thrust direction and burn times calculated considering time restrictions and mission constraints, are discussed.
Operational Strategies for Liquid Apogee Propulsion System
1991
6 pages
Report
Keine Angabe
Englisch
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