Abstract:In using the GRACE filtering process, the traditional de-correlation filtering method presents difficulties in perfectly preserving the real signal and weakening the stripe error at the same time. In order to solve this problem, the paper makes a certain improvement on the filtering method and combined EOF filtering method with de-correlation filtering method. Several experiments are used to filter real GRACE data and simulated data, respectively. The results show that the improved filtering method inherits the advantages of the EOF filtering method and the de-correlation filtering method. The method weakens the influence of the north-south stripe error as much as possible,while preserving the most realistic signal.
WANG Chenyan,YOU Wei,FAN Dongming. GRACE Time-Variable Gravity Field Filtering Based on Empirical Orthogonal Function Decomposition[J]. jgg, 2019, 39(4): 366-370.