Accession Number : ADA334738

Title :   GPS Based Attitude Determination for Spinning Satellites

Descriptive Note : Final rept. 1 Sep 94-30 Jun 97

Corporate Author : COLORADO CENTER FOR ASTRODYNAMICS RESEARCH BOULDER

Personal Author(s) : Axeirad, Penina ; Behre, Charles P.

PDF Url : ADA334738

Report Date : 10 DEC 1997

Pagination or Media Count : 164

Abstract : This report describes the research performed by the Colorado Center for Astrodynamics Research (CCAR) under an AASERT Grant to study Global Positioning System (GPS) based attitude determination for spinning satellite. Two key contributions are discussed- phase-based methods for estimation of the spin axis of a spinning satellite. and signal noise ratio (SNR) based methods for estimation of one or more spacecraft axes. The latter method, which is very robust and widely applicable, is demonstrated on actual flight data from three NASA missions. It provides instantaneous pointing knowledge at the 310 degree level with a single GPS antenna and is useful for attitude initialization, verification, GPS phase ambiguity resolution, and a reliable backup attitude determination sensor.

Descriptors :   *GLOBAL POSITIONING SYSTEM, *ARTIFICIAL SATELLITES, SPACECRAFT, DETECTORS, VERIFICATION, SIGNAL TO NOISE RATIO, FLIGHT, ANTENNAS, AXES, SPINNING(MOTION), AIMING, DETERMINATION, ATTITUDE(INCLINATION).

Subject Categories : Space Navigation and Guidance
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE