Accession Number : ADA298532

Title :   An Integrated GPS Attitude Determination System For Small Satellites.

Descriptive Note : Doctoral thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Chesley, Bruce C.

PDF Url : ADA298532

Report Date : 21 JUL 1995

Pagination or Media Count : 193

Abstract : This dissertation develops attitude determination methods based on the Global Positioning System (GPS) for small satellites. A GPS attitude receiver is used in combination with other sensors planned for a small, three-axis stabilized satellite called JAWS AT. The other attitude sensors include fiber optic gyros and digital sun sensors. The development of integrated attitude determination systems contributes to critical national technological objectives identified for small spacecraft. A recent study by the National Research Council addresses key technologies for small satellite programs. One of their principal recommendations was that, "GPS in various combinations with other guidance components can determine position and attitude very accurately, probably at significantly reduced weight and cost" (NRC, 1994, p. 4j). The report also identifies specific potential benefits of integrating OPS with other sensors on small spacecraft. "Combining GPS and an inertial measurement unit (with gyroscopes, accelerometers, or trackers) offers major advantages by bounding errors of the inertial set, providing exceptionally good long-term references and thereby ensuring precise, on-board navigation and, with appropriate complimentary techniques, providing a higher level of redundancy and/or accuracy for position, velocity, and attitude" (NRC, 1994, p. 61). This dissertation develops algorithms that result in improved accuracy and redundancy through the development of complimentary techniques for combining GPS measurements with gyroscopes and sun sensors. P. 4-5

Descriptors :   *ATTITUDE INDICATORS, *GLOBAL POSITIONING SYSTEM, *SATELLITE ATTITUDE, ALGORITHMS, FIBER OPTICS, DIGITAL SYSTEMS, INTEGRATED SYSTEMS, SPACECRAFT, ATTITUDE CONTROL SYSTEMS, DETECTORS, ACCELEROMETERS, ACCURACY, COSTS, NAVIGATION, RADIO RECEIVERS, ARTIFICIAL SATELLITES, GUIDANCE, INERTIAL SYSTEMS, REDUNDANCY, INERTIAL MEASUREMENT UNITS, ONBOARD, WEIGHT REDUCTION, GYROSCOPES, SUN, ATTITUDE(INCLINATION).

Subject Categories : Astronautics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE