Seite - 151 - 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

120 90 60 30 0 30 60 90 120 0 30 60 90 120 Ordermsnm cnm (a) Old stochastic model. 120 90 60 30 0 30 60 90 120 0 30 60 90 120 Ordermsnm cnm (b) Using AOC covariance. 120 90 60 30 0 30 60 90 120 0 30 60 90 120 Ordermsnm cnm (c) Ratio of AOC covariance / old model. 120 90 60 30 0 30 60 90 120 0 30 60 90 120 Ordermsnm cnm 10−12 10−11 10−10 Variability [unitless] (a,b,d) (d) TLS solution. 120 90 60 30 0 30 60 90 120 0 30 60 90 120 Ordermsnm cnm 15 22 80 90 100 110 120 Ratio of variability [%] (c,e) (e) Ratio of TLS solution / old model. Figure 9.13: (a), (b) and (d) show the temporal variability of the computed monthly gravity field solutions as RMS over the time series in the spectral domain. (c) and (e) show the ratio of the RMS of the respective improved solution and the reference solution for each Stokes coefficient. No filter was applied to the solutions. 9.4 Discussion 151