Post-processing GRACE satellite data to achieve unique climate records contributes to NASA's climate research focus, and is an essential component of the ACCESS Program. To stand up our GRACE ACCESS Portal, we have reuses of the PI-directed ICESat Science Information Processing System (I-SIPS) developed for ICESat for the data management and processing backend . The I-SIPS has proven to be remarkably successful in supporting rapid reprocessing and testing of data product generation under the direction of a multi-disciplinary Science Team.

Based on our participation within the GRACE Science Team and through the formation of a multidisciplinary group of Co-I collaborators, we will:

• Improve the visibility and availability of the data by providing direct search and order interfaces that we provide and through cooperation with other ESE centralized ordering systems such as ECHO.
• Leverage our extensive ties to the Space Geodesy, Geophysics, and Hydrology communities, of which our team has strong representation, and develop new and tailored data products for these communities to meet specific investigative requests. For example, our technique can solve for surface mass anomalies of any shape. We thereby can provide mass flux estimates corresponding to an aquifer template.

This investigative approach, with its simulation capabilities built into our orbit analysis system, can also be used to assess accuracy and resolution improvements obtainable from future proposed measurement technologies under investigation that exploit the GRACE concept using optical intersatellite tracking links. As part of the GRACE Science Team, we have developed an alternative approach to capture the mass flux signal more directly from the GRACE KBRR data in the form of local gravity parameters. Our goal is to capture the gravity information at the optimal level supported by the observational accuracy and spatial distribution of the inherent GRACE measurements. This has led our investigation to improve both the spatial and temporal resolution of the GRACE mass flux estimates beyond those provided as the standard science product being monthly sets of spherical harmonics. This work has been largely successful. A demonstration of the efficacy of this approach is found in Rowlands et al, (2005).