NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Geodesy by radio interferometry - Determinations of baseline vector, earth rotation, and solid earth tide parameters with the Mark I very long baseline radio interferometery systemThirty-seven very long baseline radio interferometry experiments performed between 1972 and 1978 are analyzed and estimates of baseline vectors between six sites, five in the continental United States and one in Europe are derived. No evidence of significant changes in baseline length is found. For example, with a statistical level of confidence of approximately 85 percent, upper bounds on such changes within the United States ranged from a low of 10 mm/yr for the 850 km baseline between Westford, Massachusetts, and Green Bank, West Virginia, to a high of 90 mm/yr for the nearly 4000 km baseline between Westford and Goldstone, California. Estimates for universal time and for the x component of the position of the earth's pole are obtained. For the last 15 experiments, the only ones employing wideband receivers, the root-mean-square differences between the derived values and the corresponding ones published by the Bureau International de l'Heure are 0.0012 s and 0.018 arc sec respectively. The average value obtained for the radial Love number for the solid earth is 0.62 + or - 0.02 (estimated standard error).
Document ID
19860042053
Document Type
Reprint (Version printed in journal)
Authors
Ryan, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clark, T. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Coates, R. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ma, C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wildes, W. T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
February 10, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF EAR-83-02221
CONTRACT_GRANT: F19628-83-K-0031
CONTRACT_GRANT: NAS5-27230
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: NAS5-27571
CONTRACT_GRANT: NSF GP-25865
CONTRACT_GRANT: NSF EAR-83-063803
Distribution Limits
Public
Copyright
Other