Efficient gravity field recovery from GOCE gravity gradient observations

被引:1
作者
R. Klees
R. Koop
P. Visser
J. van den IJssel
机构
[1] Delft Institute for Earth-Oriented Space Research (DEOS),
[2] Delft University of Technology,undefined
[3] Thijsseweg 11,undefined
[4] NL-2629 JA Delft,undefined
[5] The Netherlands,undefined
[6] e-mail: klees@geo.tudelft.nl; Tel.:+31 15 2785100; Fax: +31 15 2783711,undefined
来源
Journal of Geodesy | 2000年 / 74卷
关键词
Key words: Gravity field determination – Satellite gravity gradiometry – GOCE data analysis;
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摘要
 An efficient algorithm is proposed for gravity field recovery from Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) satellite gravity gradient observations. The mathematical model is formulated in the time domain, which allows the inclusion of realistic observational noise models. The algorithm combines the iterative solution of the normal equations, using a Richardson-type iteration scheme, with the fast computation of the right-hand side of the normal equations in each iteration step by a suitable approximation of the design matrix. The convergence of the iteration is investigated, error estimates are provided, and the unbiasedness of the method is proved. It is also shown that the method does not converge to the solution of the normal equations. The performance of the approach for white noise and coloured noise is demonstrated along a simulated GOCE orbit up to spherical harmonic degree and order 180. The results also indicate that the approximation error may be neglected.
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页码:561 / 571
页数:10
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