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VLBI geodesy: 2 parts-per-billion precision in length determinations for transcontinental baselines

Published online by Cambridge University Press:  03 August 2017

J. L. Davis ,
T. A. Herring  and
I. I. Shapiro
J. L. Davis
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
T. A. Herring
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138
I. I. Shapiro
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138

Abstract

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We have used very-long-baseline interferometry (VLBI) to make twenty-two independent measurements, between September 1984 and December 1986, of the length of the 3900-km baseline between the Mojave site in California and the Haystack/Westford site in Massachusetts. These experiments differ from the typical geodetic VLBI experiments in that a large fraction of observations are obtained at elevation angles between 4° and 10°. Data from these low elevation angles allows the vertical coordinate of site position, and hence the baseline length, to be estimated with greater precision. For the sixteen experiments processed thus far, the weighted root-mean-square scatter of the estimates of the baseline length is 8 mm. We discuss these experiments, the processing of the data, and the resulting baseline length estimates.

Type
Geophysics
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 367 - 368
Copyright
Copyright © Reidel 1988 

References

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