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Stability of Determining the Earth Rotation Parameters (ERP) with VLBI

Published online by Cambridge University Press:  03 August 2017

Shifang Luo  and
Dawei Zheng
Shifang Luo
Affiliation:
Shanghai Observatory, Academia Sinica, Shanghai, People's Republic of China
Dawei Zheng
Affiliation:
Shanghai Observatory, Academia Sinica, Shanghai, People's Republic of China

Abstract

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By using the observations of IRIS network, the stability of determinang ERP with VLBI is studied. It is concluded that the uncertainties from initial values of ERP, the errors of other parameters are at the same level as the formal errors in determination of ERP. The geometric effect on determination of ERP is important and appears as systematic errors. Geometric uncertainty on polar motion is greater than that on UT1. and specially much worse for the continenal network. The stability of determining ERP with VLBI can be improved either by increasing new stations at reasonable location in a VLBI network or by increasing new networks.

Type
Geophysics
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 417 - 420
Copyright
Copyright © Reidel 1988 

References

1. Carter, W.E., and Strange, W. E., The National Geodetic Survey Project “POLARIS” Tectonophysics 52.(1979) p30–46 CrossRefGoogle Scholar
2. Carter, W.E. and Robertson, D.S., IRIS Earth Rotation and Polar Motion Results Proceedings of the International Symposium on Space Techniques for Geodynamics Sopron, Hungary (1984)Google Scholar