Seite - 142 - 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 20 40 60 80 100 120 Degree 10−5 10−4 10−3 10−2 Old model Incl. AOC With TLS Diff. old model to: Incl. AOC With TLS (a) Degree amplitudes for April 2008 (good data). 0 20 40 60 80 100 120 Degree 10−5 10−4 10−3 10−2 Old model Incl. AOC With TLS Diff. old model to: Incl. AOC With TLS (b) Degree amplitudes for June 2010 (bad data). Figure 9.8: Degree amplitudes in geoid height using the old stochastic model (in brown), when taking AOC covariances into account (in blue), and for the TLS solution (in pink). (a) shows a month of good data quality. (b) shows a month of deteriorated quality due to larger than usual opening angles. Chapter9 Co-Estimation of Orientation Parameters142