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EGM_TIM_RL05: An independent geoid with centimeter accuracy purely based on the GOCE mission
Author(s) -
Brockmann Jan Martin,
Zehentner Norbert,
Höck Eduard,
Pail Roland,
Loth Ina,
MayerGürr Torsten,
Schuh WolfDieter
Publication year - 2014
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2014gl061904
Subject(s) - geoid , geodesy , gravitational field , spherical harmonics , geology , satellite , gravity of earth , orbit determination , covariance , covariance matrix , gravity anomaly , remote sensing , geophysics , physics , computer science , algorithm , mathematics , paleontology , quantum mechanics , oil field , statistics , astronomy , measured depth
Abstract After more than 4.5 years in orbit, the Gravity field and steady‐state Ocean Circulation Explorer (GOCE) mission ended with the reentry of the satellite on 11 November 2013. This publication serves as a reference for the fifth gravity field model based on the time‐wise approach (EGM_TIM_RL05), a global model only determined from GOCE observations. Due to its independence of any other gravity data, a consistent and homogeneous set of spherical harmonic coefficients up to degree and order 280 (corresponding to spatial resolution of 71.5 km on ground) is provided including a full covariance matrix characterizing the uncertainties of the model. The associated covariance matrix realistically describes the model quality. It is the first model which is purely based on GOCE including all observations collected during the entire mission. The achieved mean global accuracy is 2.4 cm in terms of geoid heights and 0.7 mGal for gravity anomalies at a spatial resolution of 100 km.