Bridging the gap between GRACE and GRACE follow-on monthly gravity field solutions using improved multichannel singular spectrum analysis

Abstract The gap between the Gravity Recovery and Climate Experiment (GRACE) GRACE Follow-on mission (GRACE-FO) is a crucial problem, leading to discontinuous global mass change information from time-variable gravity field solutions. We aim use improved Multichannel Singular Spectrum Analysis (MSSA) fill reconstruct continual signals in this study. one-year filled with MSSA based on Release 06 (RL06) monthly models provided by Center for Space Research (CSR) truncated d/o 60 further compared Swarm solutions (d/o 40). results show that infilled agree solutions, indicating can reliably bridge GRACE-FO missions. Moreover, relative Global Land Data Assimilation System (GLDAS) Noah model, have higher correlation coefficients smaller root mean squared errors than over Congo, Lena Fraser river basins. According simulation using same as GRACE-FO, very efficiently 25 major basins World.