HR: 11:25h
AN: G22A-05    [Abstracts]
TI: Regional recovery of temporal gravity fields from GRACE
AU: * Han, S
EM: han.104@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: * Han, S
EM: han.104@osu.edu
AF: Geological Sciences, Ohio State University, Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Shum, C
EM: ckshum@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Shum, C
EM: ckshum@osu.edu
AF: Geological Sciences, Ohio State University, Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Jekeli, C
EM: jekeli.1@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Jekeli, C
EM: jekeli.1@osu.edu
AF: Geological Sciences, Ohio State University, Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Chen, Y
EM: chen.862@osu.edu
AF: Laboratory for Space Geodesy and Remote Sensing, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Chen, Y
EM: chen.862@osu.edu
AF: Geological Sciences, Ohio State University, Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Alsdorf, D
EM: alsdorf.1@osu.edu
AF: Geological Sciences, Ohio State University, Mendenhall Laboratory, 125 S. Oval Mall, Columbus, OH 43210 United States
AU: Bettadpur, S
EM: srinivas@csr.utexas.edu
AF: Center for Space Research, University of Texas, 3925 West Braker Lane, Suite 200, Austin, TX 78759-5321 United States
AU: Tapley, B
EM: tapley@csr.utexas.edu
AF: Center for Space Research, University of Texas, 3925 West Braker Lane, Suite 200, Austin, TX 78759-5321 United States
AB: We provide an overview of alternative methodology developed to process GRACE Level 1B data products including KBR range-rate, precise orbit, accelerometer and attitude for regional modeling of time-variable gravity fields. The in situ geopotential differences at satellite altitude estimated primarily by KBR low-low tracking data are then inverted to recover the time-variable mass anomalies on the Earth's surface. The developed technique has demonstrated enhanced spatial and temporal resolutions (a few hundred km and several days depending on latitude) as compared to the standard method based on the monthly mean Stokes coefficients with the Gaussian or isotropic smoothing. The sensitivities to orbital parameterization/accuracy and dynamic models (e.g., tides, ocean) are studied. Finally, we present a summary of results on the recent applications of the developed techniques including Amazon basin hydrology, tides over Antarctica ice shelves, and other geodynamic phenomena.
DE: 1214 Geopotential theory and determination (0903)
DE: 1217 Time variable gravity (7223, 7230)
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: Fall Meeting 2005