An overview of the ascent trajectory and GN&C (guidance, navigation, and control) system design is followed by a summary of flight test results for the ascent phase of STS-1. The most notable variance from nominal pre-flight predictions was the lofted trajectory observed in first stage due to an unanticipated shift in pitch aerodynamic characteristics from those predicted by wind tunnel tests. The GN&C systems performed as expected on STS-1 throughout powered flight. Following a discussion of the software constants changed for Flight 2 to provide adequate performance margin, a summary of test results from STS-2 and STS-3 is presented. Vehicle trajectory response and GN&C system behavior were very similar to STS-1. Ascent aerodynamic characteristics extracted from the first two test flights were included in the data base used to design the first stage steering and pitch trim profiles for STS-3.


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    Title :

    Evaluation of the Shuttle GN&C during powered ascent flight phase


    Contributors:
    Olson, L. (author) / Sunkel, J. W. (author)

    Conference:

    Guidance and Control Conference ; 1982 ; San Diego, CA


    Publication date :

    1982-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English