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

2008b July 2008
2008a February 2008
2007c October 2007
2007b July 2007
2007a February 2007
2006c November 2006
2006b June 2006
2006a February 2006
2005c October 2005
2005b June 2005
2005a February 2005
2004b October 2004
2004a May 2004
2003b October 2003
2003a May 2003
2002c November 2002
2002b September 2002
2002a March 2002
2001d October 2001
2001c August 2001

Intensive Earth Orientation

i2010a February 2010
i2008a February 2008
i2007c October 2007
i2007b July 2007
i2007a February 2007
i2006c November 2006
i2006b June 2006
i2006a February 2006
i2005c October 2005
i2005b June 2005
i2005a February 2005
i2004b October 2004
i2004a May 2004

Celestial Reference Frame

crf2009b May 2009
crf2008b October 2008
crf2008a February 2008
crf2007c October 2007
crf2007b July 2007
crf2007a February 2007
crf2006c October 2006
crf2006b June 2006
crfk2006a May 2006
crf2006a February 2006
crf2005c October 2005
crf2005b June 2005
crf2005a February 2005
crf2004b October 2004
crf2004a March 2004
crf2003b August 2003
crf2003a February 2003
crf2002a September 2002
crf2001a October 2001

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