HR: 1340h
AN: G43C-1475    [Abstracts]
TI: Station Coordinates, low Degree Harmonics, and Earth Rotation Parameters From an Integrated GPS/CHAMP/GRACE Processing
AU: * Koenig, D
EM: dkoenig@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Koenig, R
EM: koenigr@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Neumayer, K
EM: neumayer@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Rothacher, M
EM: rothacher@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Schmidt, R
EM: rschmidt@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Flechtner, F
EM: flechtne@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AU: Meyer, U
EM: meyeru@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Telegrafenberg, Potsdam, 14473, Germany
AB: Time series of geodetic Earth system parameters as part of a global geodetic reference system have been derived for the year 2004 by means of dynamic satellite orbit adjustment. The procedure applied is the integrated approach where the GPS satellites and the Low Earth Orbiters (LEOs) CHAMP and GRACE are processed simultaneously with common standards. The set of estimated Earth system parameters includes coordinates of ground stations, low degree harmonic coefficients of the Earth's gravity field, and Earth rotation parameters. Selected parameter time series are presented and compared to external series and products for validation. The particular advantage of the integrated approach is the high sensitivity of the LEO to the geocenter in combination with the stability from the GPS constellation geometry. Also, the dense tracking coverage by GPS measurements allows for a high temporal resolution of the parameters solved for. In order to demonstrate the superior performance of the integrated approach, comparisons to the commonly applied two-step processing are presented.
DE: 1229 Reference systems
DE: 1239 Earth rotation variations
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1243 Space geodetic surveys
DE: 1295 Integrations of techniques
SC: Geodesy [G]
MN: 2007 Fall Meeting