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出 处:《Geodesy and Geodynamics》2025年第2期223-229,共7页大地测量与地球动力学(英文版)
基 金:the National Natural Science Foundation of China(E3ER0402A2,E421040401);the University of Chinese Academy of Sciences Research Start-up Grant(110400M003);the Fundamental Research Funds for the Central Universities(E2ET0411X2).
摘 要:The primary mission of the Gravity Recovery and Climate Experiment(GRACE)satellite and its successor,GRACE Follow-On(GRACE-FO),is to provide time-variable gravity fields,and its observations have been widely used in various studies.However,the nearly one-year gap between GRACE and GRACE-FO has affected our ability to obtain continuous time-variable gravity data.In this study,we use the Singular Spectrum Analysis(SSA)method to fll the nearly one-year gap between the GRACE and GRACE-FO missions,as well as the gaps within the GRACE mission itself,to generate a continuous and complete mascon product from April 2002 to December 2022.These products are evaluated at the basin scale in Greenland,Antarctica,and ten river basins worldwide,as well as across oceans.The results show that our flled data can effectively recover seasonal and interannual signals and exhibit good consistency with previous reconstructions.The products provided in this study will benefit GRACE applications related to oceans,glaciers,and terrestrial water storage.
关 键 词:Singular spectrum analysis GRACE GRACE-FO Mascon solutions Data gap flling
分 类 号:P223[天文地球—大地测量学与测量工程]
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