Abstract
Abstract Downward continuation is one of the vital steps in pre-processing of satellite gravity gradient (SGG) data when recovering the earth gravity field by space-wise method. Mathematic downward continuation model of the SGG data based on Poisson integral iteration method was constructed, of which the downward continuation effects based on ‘Direct’ and ‘Remove-Restore’ schemes were analyzed and discussed with simulated SGG data. Results show that the precision of ‘Remove- Restore’ scheme is better than that of the ‘Direct’ scheme at the height of both 5 kilometers and 250 kilometers, i.e., the ‘Remove- Restore’ technique could improve the precision of downward continuation results based on Poisson integral iteration method in a certain degree.
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