Long time series of the low wavelengths of the Earth's gravity field, from SLR-only data: 1992-2008

Details Long time series of the low wavelengths of the Earth's gravity field, from SLR-only data: 1992-2008 Long time series of the low wavelengths of the Earth's gravity field, from SLR-only data: 1992-2008

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..109d&link_type=abstract

"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes

Astronomy and Astrophysics

Astrophysics

Scientific paper

We use SLR data tracked by the ILRS network to derive long time series of the low wavelenghts of the EarthÕs gravity field. The work is based on post-fit residuals analyses, performed with the computation of orbit of geodetic satellites (LA-1 and LA-2 in particular). Osculating orbital arcs are propagated over short periods of time and adjusted on tracking data. Normal matrices are deduced from that adjustment, and then mixed. We give here a time series of the J_2 and J_3 coefficients, where variations, to be analyzed by geophysicists, can be linked to mass transfer inside the Earth: post-glacial rebound, 18.6 year tide, El Niño Southern Oscillation events.

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