NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The Accuracy of Radio Interferometric Measurements of Earth RotationThe accuracy of very long base interferometry earth rotation (UT1) measurements is examined by intercomparing TEMPO and POLARIS data for 1982 and the first half of 1983. None of these data are simultaneous, and so a proper intercomparison requires accounting for the scatter introduced by the rapid, unpredictable, UT1 variations driven by exchanges of angular momentum with the atmosphere. A statistical model of these variations, based on meteorological estimates of the Atmospheric Angular Momentum is derived, and the optimal linear (Kalman) smoother for this model is constructed. The scatter between smoothed and independent raw data is consistent with the residual formal errors, which do not depend upon the actual scatter of the UT1 data. This represents the first time that an accurate prediction of the scatter between UT1 data sets were possible.
Document ID
19850010936
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Eubanks, T. M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Steppe, J. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Spieth, M. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
February 15, 1985
Publication Information
Publication: The Telecommun. and Data Acquisition Rept.
Subject Category
Geophysics
Accession Number
85N19246
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available