The new ESA satellite-only gravity field model via the direct approach
Article first published online: 26 JUL 2013
©2013. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 40, Issue 14, pages 3607–3612, 28 July 2013
How to Cite
2013), The new ESA satellite-only gravity field model via the direct approach, Geophys. Res. Lett., 40, 3607–3612, doi:10.1002/grl.50716., , , , , , and (
- Issue published online: 22 AUG 2013
- Article first published online: 26 JUL 2013
- Accepted manuscript online: 6 JUL 2013 02:57AM EST
- Manuscript Accepted: 3 JUL 2013
- Manuscript Revised: 1 JUL 2013
- Manuscript Received: 30 MAY 2013
- satellite-only gravity field model;
- geostrophic ocean circulation
 Reprocessed Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) gravity gradient data were combined with data from Laser Geodynamics Satellite (LAGEOS) 1/2 and Gravity Recovery and Climate Experiment (GRACE) to generate a satellite-only gravity field model to degree 260 using the direct approach, named DIR-R4. When compared to Earth Gravitational Model 2008 (EGM2008), it is more accurate at low to medium resolution thanks to GOCE and GRACE data. When compared to earlier releases of ESA GOCE models, it is more accurate at high degrees owing to the larger amount of data ingested. It is also slightly more accurate than ESA's fourth release of the time-wise model (TIM-R4), as demonstrated by GPS/leveling, orbit determination tests, and an oceanographic evaluation. According to the formal, probably too optimistic by a factor of 2–2.5, cumulated geoid (1.3 cm) and gravity anomaly (0.4 mGal) errors at 100 km resolution, the GOCE mission objectives have been reached.