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Observing our Changing Earth pp 353–362 Cite as

Gravity Field Determination at the AIUB – The Celestial Mechanics Approach

• L Prange 3 ,
• A Jäggi 3 ,
• G Beutler 3 ,
• R Dach 3 &
• L Mervart 3  
• Conference paper

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Part of the book series: International Association of Geodesy Symposia ((IAG SYMPOSIA,volume 133))

We present the gravity field model AIUB-CHAMP01S, which has been generated using the Celestial Mechanics approach. GPS-derived kinematic positions of low Earth orbiters (LEOs) are used as pseudo-observations to solve for the Earth’s gravity field parameters in a generalized orbit determination problem. Apart from normalized spherical harmonic (SH) coefficients, arc-specific parameters (e.g., accelerometer calibration parameters, dynamical parameters, or pseudo-stochastic parameters) are set up and normal equations are written for all daily LEO arcs. The daily normal equations are combined to weekly, monthly, and annual systems before inversion. The parametrization can be modified on the normal equation level without a new time-consuming set up of the daily normal equations. The results based on one year of CHAMP data demonstrate that the Celestial Mechanics approach is comparable in quality with other approaches

• Gravity field determination
• Pseudo-stochastic parameters
• Accelerometer data

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Beutler, G. (2005). Methods of Celestial Mechanics, Springer-Verlag

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Astronomical Institute (AIUB), University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland

L Prange, A Jäggi, G Beutler, R Dach & L Mervart

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Fac. Engineering Dept. Geomatics Engineering, University of Calgary, 2500 University Drive NW, Calgary AB T2N 1N4, Canada

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Prange, L., Jäggi, A., Beutler, G., Dach, R., Mervart, L. (2009). Gravity Field Determination at the AIUB – The Celestial Mechanics Approach. In: Sideris, M.G. (eds) Observing our Changing Earth. International Association of Geodesy Symposia, vol 133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85426-5_42

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