The Space Launch System (SLS) Exploration Mission 1 (EM-1) test flight will use open-loop guidance for Boost Stage (BS) flight. A table of attitude commands as a function of altitude, called the chi table, will be loaded onto the flight computers. The chi table will be generated using the measured winds on launch day by the Chi Angle Optimizer (CHANGO) software tool. Details of CHANGO’s design are given, including a Three Degrees-of-Freedom (3-DOF) simulation and a numerical minimization routine. CHANGO’s use in launch day operations is also described.


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    Title :

    CHANGO: A Software Tool for Boost Stage Guidance of the Space Launch System Exploration Mission 1


    Contributors:

    Conference:

    2019 AAS/AIAA Astrodynamics Specialist Conference ; 2019 ; Portland, ME, United States


    Publication date :

    2019-08-11


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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