The Cassini spacecraft has been in orbit around Saturn since July 1, 2004. To remain on the planned trajectory which maximizes science data return, Cassini must perform orbit trim maneuvers using either its main engine or its reaction control system thrusters. Over 200 maneuvers have been executed on the spacecraft since arrival at Saturn. To improve performance and maintain spacecraft health, changes have been made in maneuver design command placement, in accelerometer scale factor, and in the pre-aim vector used to align the engine gimbal actuator prior to main engine burn ignition. These and other changes have improved maneuver performance execution errors significantly since 2004. A strategy has been developed to decide whether a main engine maneuver should be performed, or whether the maneuver can be executed using the reaction control system.


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    Title :

    Cassini Orbit Trim Maneuvers at Saturn - Overview of Attitude Control Flight Operations


    Contributors:

    Conference:

    AIAA Guidance, Navigation, and Control Conference ; 2011 ; Portland, OR, United States


    Publication date :

    2011-08-08


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Cassini Orbit Trim Maneuvers at Saturn - Overview of Attitude Control Flight Operations

    Burk, T. / American Institute of Aeronautics and Astronautics; Conferderation of European Aerospace Societies | British Library Conference Proceedings | 2011