NASA's Dawn spacecraft, an ion-thrust science mission to Vesta and Ceres, has numerous pointing constraints critical for safe operation. Onboard software automatically chooses target attitudes but enforces only a simplified constraint set at slew endpoints. Onboard fault-protection also uses simplified constraints, and violations can result in safing events that dramatically consume mission margins for missed thrust. Lastly, for funding reasons the operations team is lean, forcing the development of month-long command sequences. These factors place a premium on reliable maneuver design, prediction, and verification against pointing constraints. This paper presents Slewth, a ground tool built to address these concerns.


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    Title :

    Verification of Pointing Constraints for the Dawn Spacecraft


    Contributors:

    Conference:

    AIAA/AAS Astrodynamics Specialists Conference ; 2008 ; Honolulu, HI, United States


    Publication date :

    2008-08-18


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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