Analysis and intercomparison of LRI and KBR gravity fields and their post-fit range rate residuals

At IfE we estimate monthly gravity field coefficients in terms of spherical harmonic coefficients by using our in-house developed software GRACE-SIGMA. Our recent publication about the post-fit residual analysis of LRI monthly gravity fields showed some unknown effects, (range-rate effects, panel-effects, CNR-effects), which we address further in order to improve our understanding of the overall LRI processing. In addition, we want to give an overview of ocean tide errors and non-modeled ocean tide frequencies that have been identified in GRACE(-FO) K-band post-fit range rate residuals. Furthermore, we present our recent analyses of the spherical harmonic coefficients obtained from LRI gravity fields as well as the combined processing and quality assessment of LRI and KBR.