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Consistency of CDP and IRIS VLBI Earth orientation results

Published online by Cambridge University Press:  03 August 2017

A. Mallama ,
T. A. Clark  and
J. W. Ryan
A. Mallama
Affiliation:
Science Applications Research, Code 621.9, NASA/GSFC, Greenbelt, Maryland 20771, USA
T. A. Clark
Affiliation:
Code 621.9, NASA/GSFC, Greenbelt, Maryland 20771, USA
J. W. Ryan
Affiliation:
Code 621.9, NASA/GSFC, Greenbelt, Maryland 20771, USA

Abstract

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This study compares the earth orientation results obtained by the NASA CDP and the NGS IRIS experiments. The results agree at about one combined formal error (two milliarcseconds) after small biases (one to three milliarcseconds) have been removed from each component. Furthermore the biases are found to correspond to small rotations between the reference frames, principally the terrestrial frame, for the two sets of experiments. In the past the CDP data has not been used in combined solutions of earth orientation parameters prepared by the data centers at the U.S.N.O. and the B.I.H. The authors propose that these data should be included because they are distinct from the IRIS data and represent an important supplement to those data. We also point out that the total number of observations is about equal in the CDP and IRIS experiment sets.

Type
III. Determination of Earth Rotation Parameters
Information
Symposium - International Astronomical Union , Volume 128: Earth's Rotation and Reference Frames for Geodesy and Geodynamics , 1988 , pp. 187 - 192
Copyright
Copyright © Reidel 1988 

References

Feissel, M. (1986), Preprint: ‘Analysis of the Ties Between Earth Orientation Determinations and the Related Reference Frames.’ Google Scholar
Mallama, A. (1985), ‘A Comparison of Earth Orientation Data Obtained by Different Space Techniques’, in Proceedings of the International Conference on Earth Orientation and the Terrestrial Reference Frame, p. 637.Google Scholar