In mid-2014 the Dawn team finalized preparations for the spacecraft’s approach to Ceres. The design was the product of careful planning that began several years in advance, when the spacecraft left Vesta in September 2012. However, a few months prior to the anticipated start of approach, the spacecraft entered a safe mode. While temporary loss of thrust for ion propulsion missions is usually not mission-critical, it still presents many challenges. The safing event occurred at a time when thrusting to match Ceres’ orbital velocity was most effective, which meant the spacecraft must fly past Ceres before capturing into orbit. The new approach geometry changed the team’s strategy for navigating the spacecraft safely into orbit around Ceres with optical data. In this paper we describe the challenges of navigating the Dawn spacecraft into orbit around Ceres, including the safing event and re-design of the approach architecture.


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    Titel :

    Dawn Safing Approach to Ceres Re-Design


    Beteiligte:

    Kongress:

    AIAA/AAS Astrodynamics Specialist Conference ; 2016 ; Long Beach, CA, United States


    Erscheinungsdatum :

    12.09.2016



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    DAWN SAFING APPROACH TO CERES RE-DESIGN

    Grebow, Daniel J. / Whiffen, Gregory J. / Han, Dongsuk et al. | British Library Conference Proceedings | 2016


    Dawn Safing Approach to Ceres Re-Design

    Grebow, Daniel / Whiffen, Gregory J. / Han, Dongsuk et al. | AIAA | 2016


    Architecting the Dawn Ceres Science Plan

    Polanskey, Carol A. / Joy, Steven P. / Raymond, Carol A. et al. | AIAA | 2014


    Dawn Ceres Mission: Science Operations Performance

    Polanskey, Carol A. / Joy, Steven P. / Raymond, Carol A. et al. | AIAA | 2016