Status of the Swath solutions from GRACE

Over the past 15 years, the GRACE mission has provided a unique dataset that measures the total water column in the Earth System. With the launch of GRACE-FO, the time series of this unique mass flux dataset is now being continued. In addition to the monthly gravity field product provided by the project, different research groups have developed multiple short time-scale solutions over the years, including sliding window solutions, Kalman filter time-series etc. All of these GRACE/GRACE-FO solutions require special handling for data assimilation into models.

The Center for Space Research at the University of Texas at Austin (CSR) has developed a "swath" solution time-series from GRACE in an effort to achieve a true daily GRACE solution. Using Tikhonov regularization, a daily "swath" total water storage (TWS) solution from GRACE is estimated in the mascon domain. This paper performs detailed analysis of the signals from these new solutions in the temporal and spatial domains with emphasis on the validation of the high frequency signals from these solutions using other available models and in-situ data sets. This paper will discuss the development of the swath solutions, present the analysis results and the release schedule.