Combined satellite gravity field model GOCO01S derived from GOCE and GRACE

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...

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Bibliographic Details
Published in:Geophysical research letters 2010-10, Vol.37 (20), p.n/a
Main Authors: Pail, R., Goiginger, H., Schuh, W.-D., Höck, E., Brockmann, J. M., Fecher, T., Gruber, T., Mayer-Gürr, T., Kusche, J., Jäggi, A., Rieser, D.
Format: Article
Language:English
Subjects:
combination
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geodesy
Geodetics
Geographic information systems
Geophysics
global gravity field
Global Positioning System
Global positioning systems
GOCE
GOCE (experiment)
GPS
GRACE
GRACE (experiment)
Gravitation
Gravitational fields
Gravity
Oceanography
Satellite navigation systems
Satellites
spherical harmonics
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Summary: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.
ISSN:0094-8276
1944-8007
DOI:10.1029/2010GL044906