Daily Swath Solutions from GRACE and GRACE-FO: Using Range-Rate vs Range-Acceleration SST Data

The GRACE Follow-On (GRACE-FO) mission is continuing the unprecedented mass anomaly time-series started by the GRACE mission. Our team at the Center for Space Research has developed a true daily total water storage anomaly product by computing daily estimates along the "swaths" of daily GRACE ground tracks using the SST range-rate data. This paper discusses results from extending the GRACE swath total water storage product timeseries to GRACE-FO using the range-rate data. We present the techniques for computing such a solution and discuss the error and uncertainty characterization for GRACE and GRACE-FO. This paper also presents the results from computing the swath solutions using the SST range-acceleration data from GRACE and GRACE-FO. We discuss the comparisons in the techniques used for and the results produced using SST range-rate vs range-acceleration data. We present the comparisons with official RL06 GRACE/GRACE-FO solutions and other alternate higher temporal resolution GRACE/GRACE-FO solutions to understand the impact on the science results.