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Naval Meteorology and Oceanography Command U.S. Naval Observatory
Thursday November 23, 2017

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USNO Global VLBI Solutions

Listed here are the U.S. Naval Observatory's Global VLBI Solutions .  These solutions are used for the determination of the Terrestrial Reference Frame (TRF), the Celestial Reference Frame (CRF), and the estimation of Earth Orientation Parameters (EOP).  The solutions yield catalogs of source positions, station positions and velocities, and Earth orientation parameters.  The data were reduced and solutions derived using the Mark 4 VLBI Analysis Software (CALC/SOLVE) maintained by the GSFC Geodetic VLBI Group.  In the most cases, the solutions use all available multi-baseline VLBI observations at 8.4 GHz (X-band) and 2.2 GHz (S-band) from 3 August, 1979 through the date specified.

Earth Orientation

Intensive Earth Orientation

Celestial Reference Frame

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