Geocentre variation from laser tracking of LAGEOS1/2 and loading data

Details Geocentre variation from laser tracking of LAGEOS1/2 and loading data Geocentre variation from laser tracking of LAGEOS1/2 and loading data

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003adspr..31.1927m&link_type=abstract

Advances in Space Research, Volume 31, Issue 8, p. 1927-1933.

Physics

14

Scientific paper

Variation in the geocentre is a response to mass redistribution of the solid earth, oceans, atmosphere and hydrosphere. Station coordinates of laser rangers have been determined from tracking of LAGEOS 1/2 for 1993-2001 in weakly constrained solutions. A Helmert transformation yielded an annual geocentre variation of about 3-4 mm along the X and Y axis and 5 mm along the Z axis. The geocentre can also be estimated from geophysical data including surface atmospheric pressure, continental water levels and ocean mass. These geophysical estimates are compared against the satellite derived solution. The geophysical data is used in a comprehensive examination of the annual mass redistribution in terms of geocentre variation and elastic Earth deformation for station coordinates and orbital perturbations due to the annual variation in the gravity field harmonics.

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