HR: 1340h
AN: G33B-0048    [Abstracts]
TI: Time-Variable Gravity Derived From GRACE, CHAMP and LAGEOS
AU: * Neumayer, K
EM: neumayer@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Rothacher, M
EM: rothacher@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Reigber, C
EM: reigber@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Schmidt, R
EM: rschmidt@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Flechtner, F
EM: flechtne@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Meyer, U
EM: meyeru@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Koenig, R
EM: koenigr@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AU: Foerste, C
EM: foer@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam Dept. Geodesy and Remote Sensing, Telegrafenberg, Potsdam, D-14473 Germany
AB: GRACE, CHAMP and LAGEOS tracking data have recently been reprocessed at GFZ Potsdam based on improved processing standards, models and data screening resulting in time series of several years of weekly to monthly gravity field solutions with varying spatial resolution, maximum up to degree and order 150. These time series have been combined in order to derive a satellite-only mean gravity field serving as a new reference for the GFZ-GRGS EIGEN-CGS04C combination gravity field model expanded up to degree and order 360. The GRACE time series can be used to trace hydrological signals on length scales of a few hundred kilometers. The paper will present some examples and comparisons with respect to previous GRACE and external solutions showing the considerable improvements that could be achieved due to the new processing strategy. Additionally, the time series of the low degree harmonic coefficients of the three homogenously processed missions are compared internally and to other results.
DE: 1200 GEODESY AND GRAVITY
DE: 1217 Time variable gravity (7223, 7230)
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
SC: Geodesy [G]
MN: Fall Meeting 2005