Page - 139 - 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

−1 0 1 −1 0 1 1 2 1 2 3 −1 0 1 2005 2007 2009 2011 2013 2015 −1 0 1 Oldmodel Incl. AOC WithTLS Orbit Swap Figure 9.7: Monthly estimates for the KF to SRF misalignment expressed in Euler angles. Results given for the old model (brown), when using AOC covariance matrices (blue), and for the TLS estimate (pink). The vertical red lines indicate orbit swap manoeuvres. The shaded area indicates the time period of reduced thermal management. The right margin shows a scaled kernel density estimate for the distribution of the estimated Euler angles. Note that the scales are identical for the same angles on GRACE-A and GRACE-B, but differ between the roll, pitch, and yaw-angles. 9.3 Results 139