HR: 10:35h
AN: G22A-02 INVITED     [Abstracts]
TI: Revealing GRACE's True Stripes: Post-processing Removal of Correlated Errors in GRACE Gravity Fields.
AU: * Swenson, S C
EM: swensosc@colorado.edu
AF: University of Colorado, CB 390 University of Colorado, Boulder, CO 80309
AU: Wahr, J
EM: wahr@colorado.edu
AF: University of Colorado, CB 390 University of Colorado, Boulder, CO 80309
AB: Typically, GRACE error reduction has been achieved via isotropic spatial filtering to average out errors. These filters are based on the assumption of randomly distributed errors. Errors in GRACE maps are often described by the term ``striping''. The implication is that the errors are not randomly distributed in space for a given month, but are correlated. Recently, attempts have been made to create non-isotropic filters based on the spatial patterns exhibited in the GRACE data. We approach the problem in the spectral domain, and show that the correlated component of the GRACE errors (i.e ``striping'') can be, to some extent, isolated and removed from the data. This analysis provides a clearer picture of the resolution of the traditional method (spherical harmonics) of representing the gravity field used by GRACE.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: Fall Meeting 2005