Seite - 131 - 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

0.1 1 10 100 Frequency [mHz] 10−7 10−6 10−5 Oldmodel Incl. AOC WithTLS Figure 9.1: Estimated stationary noise PSD without considering full AOC covariance matrices (in brown), when taking them into account (in blue), and when co-estimating satellite orientation (in pink), for June 2010. The shaded area is the same as in fig. 8.8. −1.00 −0.75 −0.50 −0.25 0.00 0.25 0.50 0.75 1.00 Correlation r [unitless] 0 1 2 3 4 Oldmodel Incl. AOC WithTLS Figure 9.2: Distribution of correlation coefficients r between arc-wise variance factors σˆ2m and mean opening angles β¯m. One correlation coefficient was estimated per month. 9.3 Results 131