Communications considerations of the very long baseline interferometry demonstration using the tracking and data relay satellite system

Details Communications considerations of the very long baseline interferometry demonstration using the tracking and data relay satellite system Communications considerations of the very long baseline interferometry demonstration using the tracking and data relay satellite system

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986inns.iafcw....l&link_type=abstract

IAF, International Astronautical Congress, 37th, Innsbruck, Austria, Oct. 4-11, 1986. 7 p. NASA-NSF-supported research.

Astronomy and Astrophysics

Astronomy

Quasat, Radio Telescopes, Spaceborne Telescopes, Tdr Satellites, Very Long Base Interferometry, Spacecraft Communication

Scientific paper

A desire for increased angular resolution at microwave frequencies has led to the development of radio telescopes with very lage effective apertures. Very long baseline interferometry (VLBI) has made it possible to synthesize telescopes with effective dimensions of a large fraction of an earth diameter. By using a satellite-borne radio telescope as part of a VLBI array, the dimensions of the earth cease to be a limitation. A demonstration was performed to show that the orbiting VLBI (OVLBI) concept is feasible. The Tracking and Data Relay Satellite System (TDRSS) was used as the orbiting element of the VLBI demonstration. Stability tests were made before the observations to determine the suitability of the TDRSS for OVLBI use. The first successful OVLBI observations were performed using the 64-m antenna observatories of NASA's Deep Space Network in Tidbinbilla, Australia, and of the Institute for Space and Astronautical Science in Usuda, Japan in conjunction with the TDRSS.

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