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|Title: ||Combinations of Earth orientation measurements : SPACE2007, COMB2007, and POLE2007.|
|Authors: ||Ratcliff, James T.|
Gross, R. S.
Global Positioning System
very long baseline interferometry
(very long baseline interferometry) VLBI
|Issue Date: ||Apr-2009 |
|Publisher: ||Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2009.|
|Series/Report no.: ||JPL Publication|
|Abstract: ||Independent 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, SPACE2007, consists of values and uncertainties for Universal Time, polar motion, and their rates that span from September 28, 1976, to March 29, 2008, at daily intervals and is available in versions whose epochs are given at either midnight or noon. The space-geodetic measurements used to generate SPACE2007 have then been combined with optical astrometric measurements to form two additional combined Earth orientation series: (1) COMB2007, consisting of values and uncertainties for Universal Time, polar motion, and their rates that span from January 20, 1962, to March 29, 2008, at daily intervals and which is also available in versions whose epochs are given at either midnight or noon; and (2) POLE2007, consisting of values and uncertainties for polar motion and its rate that span from January 20, 1900, to March 22, 2008, at 30.4375-day intervals.|
|Appears in Collections:||JPL TRS 1992+|
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