GRACE-FO and SLR updates from GSFC

We present a summary of our recent work on time-variable gravity estimates derived from GRACE/GRACE-FO and satellite laser ranging (SLR). We will show analyses summarizing the impacts of the improved accelerometer transplant product on our unregularized monthly spherical harmonics and regularized mascons. Additionally, we will discuss new efforts to leverage our high-resolution regression approach to capture short-term mass changes and climatology signals with enhanced spatial resolution and improved signal recovery. For our SLR work, we will present recent analysis of the impacts of the background gravity models on the C20 and C30 solutions provided in Technical Note 14, where considered models include a low degree expansion trend and seasonal regression model (current approach), GRACE/GRACE-FO RL06, and GRACE-FO RL06.1. New combined GRACE/GRACE-FO/SLR estimates are also presented and discussed. This work seeks to assess the reliability of Technical Note 14, and to investigate the potential benefit and impact of “quick-look” and “final” estimates of C20 and C30.