Space, The Final VLBI Frontier

Details Space, The Final VLBI Frontier Space, The Final VLBI Frontier

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.5117m&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #51.17; Bulletin of the American Astronomical Society, Vol. 25, p.889

Astronomy and Astrophysics

Astronomy

Scientific paper

In the mid 1990s two space VLBI missions, VSOP (Japan) and RADIOASTRON (Russia), are due to be launched. Significant contributions to these missions are being provided by NASA and NRAO. Operating in conjunction with ground-based VLBI networks, such as the VLBA, these missions will be able to provide high resolution images or models of several different classes of astronomical objects, most notably the cores of AGN. RADIOASTRON will be in a 28-hour orbit with an apogee height of 80,000 km whereas VSOP will be in a 6-hour orbit with an apogee height of 20,000 km. The principle scientific goal of the RADIOASTRON mission is to search for high brightness temperatures, while VSOP will primarily focus on high resolution imaging. At the maximum observing frequency of 22 GHz, the resolution with RADIOASTRON will be 30 mu as compared to 75 mu as with VSOP. The announcements of opportunity (AOs) to propose for these missions are expected to be released in late 1993. This paper describes these missions, the US contributions, and how US scientists can propose to use these missions.

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