The new Earth gravity models and the measurement of the Lense-Thirring effect

Details The new Earth gravity models and the measurement of the Lense-Thirring effect The new Earth gravity models and the measurement of the Lense-Thirring effect

2003-08-07

arxiv.org/abs/gr-qc/0308022v5

M. Novello, S. P. Bergliaffa, and R. Ruffini (eds.), On Recent Developments in Theoretical and Experimental General Relativity

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex2e, 8 pages, 3 tables, no figures. Paper presented at Tenth Marcel Grossmann Meeting on General Relativity Rio de Janeiro

Scientific paper

10.1142/9789812704030_0062

We examine how the new forthcoming Earth gravity models from the CHAMP and, especially, GRACE missions could improve the measurement of the general relativistic Lense-Thirring effect according to the various kinds of observables which could be adopted. In a very preliminary way, we use the recently released EIGEN2 CHAMP-only and GRACE01S GRACE-only Earth gravity models in order to assess the impact of the mismodelling in the even zonal harmonic coefficients of geopotential which represents one of the major sources of systematic errors in this kind of measurement.

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