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Combinations of Earth Orientation Measurements: SPACE2012, COMB2012, and POLE2012Independent Earth orientation measurements taken by the space-geodetic techniques of lunar and satellite laser ranging, very long baseline interferometry, and the Global Positioning System have been combined using a Kalman filter. The resulting combined Earth orientation series, SPACE2012, consists of values and uncertainties for Universal Time, polar motion, and their rates that span from September 28, 1976, to April 26, 2013, at daily intervals and is available in versions with epochs given at either midnight or noon. The space-geodetic measurements used to generate SPACE2012 have then been combined with optical astrometric measurements to form two additional combined Earth orientation series: (1) COMB2012, consisting of values and uncertainties for Universal Time, polar motion, and their rates that span from January 20, 1962, to April 26, 2013, at daily intervals and which are also available in versions with epochs given at either midnight or noon; and (2) POLE2012, consisting of values and uncertainties for polar motion and its rate that span from January 20, 1900, to May 22, 2013, at 30.4375-day intervals.
Document ID
20140011392
Document Type
Other
External Source(s)
Authors
Ratcliff, J. T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gross, R. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 8, 2014
Publication Date
December 1, 2013
Subject Category
Geophysics
Report/Patent Number
JPL-Publ-13-16
Funding Number(s)
PROJECT: JPL Proj. No. 102688
CONTRACT_GRANT: NNN12AA01C
Distribution Limits
Public
Copyright
Public Use Permitted.

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