Combined satellite gravity field model GOCO01S derived from GOCE and GRACE

Details Combined satellite gravity field model GOCO01S derived from GOCE and GRACE Combined satellite gravity field model GOCO01S derived from GOCE and GRACE

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3720314p&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 20, CiteID L20314

Physics

Geophysics

9

Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Geodesy And Gravity: Geopotential Theory And Determination (0903), Geodesy And Gravity: Gravity Anomalies And Earth Structure (0920, 7205, 7240)

Scientific paper

The satellite-only gravity field model GOCO01S is a combination solution based on 61 days of GOCE gravity gradient data, and 7 years of GRACE GPS and K-band range rate data, resolved up to degree/order 224 of a harmonic series expansion. The combination was performed consistently by addition of full normal equations and stochastic modeling of GOCE and GRACE observations. The model has been validated against external global gravity models and regional GPS/leveling observations. While low to medium degrees are mainly determined by GRACE, significant contributions by the new measurement type of GOCE gradients can already be observed at degree 100. Beyond degree 150, GOCE becomes the dominant contributor. Correspondingly, with GOCO01S a global gravity field model with high performance for the complete spectral range up to degree/order 224 is now available. This new gravity model will be beneficial for many applications in geophysics, oceanography, and geodesy.

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