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    Attitude determination for small satellites using gps signal-to-noise ratio

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    Peters_uaf_0006N_10128.pdf
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    Author
    Peters, Daniel
    Chair
    Raskovic, Dejan
    Committee
    Hawkins, Joseph
    Thorsen, Denise
    Metadata
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    URI
    http://hdl.handle.net/11122/4591
    Abstract
    An embedded system for GPS-based attitude determination (AD) using signal-to-noise (SNR) measurements was developed for CubeSat applications. The design serves as an evaluation testbed for conducting ground based experiments using various computational methods and antenna types to determine the optimum AD accuracy. Raw GPS data is also stored to non-volatile memory for downloading and post analysis. Two low-power microcontrollers are used for processing and to display information on a graphic screen for real-time performance evaluations. A new parallel inter-processor communication protocol was developed that is faster and uses less power than existing standard protocols. A shorted annular patch (SAP) antenna was fabricated for the initial ground-based AD experiments with the testbed. Static AD estimations with RMS errors in the range of 2.5° to 4.8° were achieved over a range of off-zenith attitudes.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2014
    Date
    2014-05
    Type
    Thesis
    Collections
    Engineering

    entitlement

     
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