HR: 0800h
AN: G21A-0095    [Abstracts]
TI: PPP versus "network" positioning: first results of the GINS CNES/GRGS software.
AU: * Perosanz, F
EM: felix.perosanz@cnes.fr
AF: Centre National d'Etudes Spatiales, 18, avenue Edouard Belin, Toulouse, 31401, France
AU: Melachroinos, S
EM: stavros@pontos.cst.cnes.fr
AF: Centre National d'Etudes Spatiales, 18, avenue Edouard Belin, Toulouse, 31401, France
AU: Loyer, S
EM: sylvain.loyer@cls.fr
AF: Collecte Localisation Satellites, 8-10 rue Hermes Parc Technologique du canal, Ramonville, 31520, France
AU: Biancale, R
EM: richard.biancale@cnes.fr
AF: Centre National d'Etudes Spatiales, 18, avenue Edouard Belin, Toulouse, 31401, France
AB: CNES/GRGS has implemented the capability to process GPS data in the PPP mode in its GINS software which was already capable to estimate classical network adjustment using Zero-Difference and Double-Difference observables. The PPP and "network" strategies are compared in the framework of two different classes of scientific positioning objectives: - hourly estimation of 3D crustal deformations due to sub-diurnal solid earth tides and ocean tide loading effects - daily/weekly computation of seasonal and secular vertical displacements induced by atmospheric and hydrologic loading phenomena. In addition different PPP strategies are evaluated using cross-combinations of different orbit and clock products as well as antenna phase centre corrections. The sources of discrepancies between the different sets of solutions are discussed.
DE: 1211 Non-tectonic deformation
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
DE: 1243 Space geodetic surveys
DE: 1295 Integrations of techniques
SC: Geodesy [G]
MN: 2007 Fall Meeting