Space VLBI Co-Observing Developments at teh DSN
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VLBI DSN VSOP↗
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Space VLBI telecommunication characteristics, protection criteria, and frequency sharing
A brief description of the technical characteristics of space VLBI is made, emphasizing the VLBI cross-correlation process. The signal-to-noise ratio of the cross-correlation process should be maintained as large as possible for the duration of the observation. Protection of this process from unwanted interference is a primary objective. The telecommunication radio links required in a space VLBI system are identified and characterized. Maximum bandwidths are suggested, as well as the minimum carrier frequencies required for the telemetering and the phase-transfer radio links. Planned space VLBI system models-Radioastron (Russia), VLBI Space Observatory Project (VSOP) (Japan), and the DSN orbiting VLBI subnet. (United States)--are taken as a baseline to determine the interference criteria. It is concluded that existing interference criteria for near-Earth research satellites are suitable for the protection of the space VLBI systems planned.
Gutierrez-Luaces, B. O.↗
Space VLBI Mission Operational Support at the NASA Deep Space Network
The first Space Very Long Baseline Interferometry (VLBI) mission VSOP has been successfully operated since 1997 and several follow-on missions are in development or under discussion.
DSN space VLBI VSOP mission operations↗