VLBI tracking of the TDRS

Details VLBI tracking of the TDRS VLBI tracking of the TDRS

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jansc..36..347r&link_type=abstract

(AAS and AIAA, Astrodynamics Specialists Conference, Kalispell, MT, Aug. 10-13, 1987) Journal of the Astronautical Sciences (ISS

Astronomy and Astrophysics

Astronomy

Satellite Tracking, Tdr Satellites, Very Long Base Interferometry, Covariance, Ionospheric Disturbances, Superhigh Frequencies, Tracking Stations, Ultrahigh Frequencies

Scientific paper

The use of radio interferometry is being investigated by NASA/Goddard Space Flight Center as a means to track the TDRS geostationary satellites. This technique offers the advantages of very high accuracy using a ground network confined to the continental U.S. and minimal (or no) impact on spacecraft systems as the downlink transmissions can be used passively. A demonstration experiment was performed using very long baseline interferometry (VLBI). The TDRS-E was observed at S-band over a 28-hour definitive period together with dual X/S-band calibration observations of quasars. An orbit was determined for TDRS-E which agrees within estimated error bars with the orbit solution from NASA's operational tracking system but with about half the uncertainty. It was found that, for S-band tracking, the ionosphere is the largest source of orbit error. Use of Ku-band tracking instead would permit geostationary orbits accurate at the 10-m level.

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