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NASA Space Geodesy Program: GSFC data analysis, 1992. Crustal Dynamics Project VLBI geodetic results, 1979 - 1991The Goddard VLBI group reports the results of analyzing 1648 Mark 3 data sets acquired from fixed and mobile observing sites through the end of 1991, and available to the Crustal Dynamics Project. Two large solutions were used to obtain Earth rotation parameters, nutation offsets, radio source positions, site positions, site velocities, and baseline evolution. Site positions are tabulated on a yearly basis for 1979 to 1995, inclusive. Site velocities are presented in both geocentric Cartesian and topocentric coordinates. Baseline evolution is plotted for 200 baselines, and individual length determinations are presented for an additional 356 baselines. This report includes 155 quasar radio sources, 96 fixed stations and mobile sites, and 556 baselines.
Document ID
Document Type
Technical Memorandum (TM)
Ryan, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ma, C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Caprette, D. S. (Hughes STX, Inc. Lanham, MD., United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1993
Subject Category
Report/Patent Number
NAS 1.15:104572
Distribution Limits
Work of the US Gov. Public Use Permitted.

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