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TitleA combined least-squares destriping and statistical filter for GRACE
AuthorCrowley, J W; Huang, J
SourceGeophysical Research Letters .
Alt SeriesNatural Resources Canada, Contribution Series 20180419
PublisherAmerican Geophysical Union
Documentserial
Lang.English
Mediapaper; on-line; digital
ProgramNational Aquifer Evaluation & Accounting, Groundwater Geoscience
AbstractA method is developed for estimating and removing correlated errors (stripes) and noise from the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) mission data. A joint-inversion estimates correlated errors between spherical harmonics while simultaneously fitting statistically significant temporal trends. The method is highly effective at removing stripes while preserving real signals. The method is applied to the release 5 and new release 6 solutions from the Center for Space Research at The University of Texas at Austin, providing a relative assessment of the two releases and demonstrating that the method significantly improves solution quality. Application of the method to model solutions for global terrestrial water storage and snow/ice for Greenland and Northern Canada demonstrates that the method preserves real signals, especially in extreme places like Greenland, and does not introduce spurious artifacts.
Summary(Plain Language Summary, not published)
A method is developed for estimating and removing correlated errors (stripes) and noise from the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) mission data. The method is effective at removing the problematic stripes while at the same time preserving real signals. The method is applied to the release 5 and new release 6 solutions from the Center for Space Research at The University of Texas at Austin and demonstrates a substantial improvement in quality as well as providing a relative assessment of the two data sets. Application of the method to model solutions for global terrestrial water storage and snow/ice for Greenland and Northern Canada demonstrates that the method preserves real signals, especially in places where real signals resembling stripes are often mistakenly removed. This method provides an important tool for cleaning and improving the GRACE level 2 monthly solutions before performing more detailed mass change analyses.
GEOSCAN ID313757