Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982asdy.confq....y&link_type=abstract
American Institute of Aeronautics and Astronautics and American Astronautical Society, Astrodynamics Conference, San Diego, CA,
Astronomy and Astrophysics
Astronomy
Differential Interferometry, Geosynchronous Orbits, Orbital Position Estimation, Radio Tracking, Satellite Tracking, Very Long Base Interferometry, Global Positioning System, Navstar Satellites, Position Errors, Quasars, Radio Interferometers, Reference Stars
Scientific paper
Four approaches to radio interferometric tracking of geosynchronous satellites are analyzed and compared. Quasar-based differential very-long-baseline interferometry, which requires a very sensitive receiver, can achieve meter-level position accuracy with a two-baseline system. Satellite-based differential VLBI gives somewhat lower accuracy with a compact, inexpensive receiver. Nondifferential VLBI, using less precise media and clock calibrations obtained by observing the GPS satellites, still gives 5-10 m position accuracy with two baselines. For a sufficiently inclined orbit, all interferometric approaches can yield six-component satellite state from a single baseline.
Wu Shang-Chen
Yunck Thomas P.
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