Seite - 147 - in Contributions to GRACE Gravity Field Recovery - Improvements in Dynamic Orbit Integration, Stochastic Modelling of the Antenna Offset Correction, and Co-Estimation of Satellite Orientations

60°S 30°S 0° 30°N 60°N 180°W 90°W 0° 90°E 180°E (a) Old stochastic model. 1 (b) Using AOC covariance. (c) Difference AOC covariance - old model. 1 (d) TLS solution. (e) Difference TLS solution - old model. 0 2 4 6 8 10 Equivalentwater height [cm] (a,b,d) −1.0 −0.5 0.0 0.5 1.0 Equivalentwater height [cm] (c,e) Figure 9.11: Global temporal variability of monthly gravity field solutions in equivalent water height. The top and left column shows the variability of the computed solution as the RMS over the time series. The right column shows the difference of the variability of the improved solutions w.r.t. the reference solution. A 300km Gaussian filter was applied to all solutions. 9.3 Results 147