HR: 0800h
AN: G21A-0097    [Abstracts]
TI: A Critical Assessment of the Current EGNOS Performance
AU: Opitz, M
EM: mopitz@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics Univ. of Technology , Vienna, Gusshausstrasse 27-29, Vienna, A-1040, Austria
AU: Thaler, G
EM: gthaler@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics Univ. of Technology , Vienna, Gusshausstrasse 27-29, Vienna, A-1040, Austria
AU: * Weber, R
EM: rweber@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics Univ. of Technology , Vienna, Gusshausstrasse 27-29, Vienna, A-1040, Austria
AB: The main purpose of this presentation is to evaluate the current performance of the European Geostationary Navigation Overlay Service (EGNOS) in comparison to commercial, local DGPS services. In full operational capability (FOC) EGNOS provides orbit and clock-corrections of all GPS satellites as well as the ionospheric delay for real-time users within the service area by means of three geostationary satellites. In addition EGNOS should disseminate integrity information in the near future. The analysis is mainly based on the comparison of the trajectories of a slowly moving vehicle obtained by two real-time correction techniques – EGNOS and WEP (Wienstrom Positioning Service Provider). The tests are carried out in medium obstructed environment which slightly harms the visibility of the EGNOS satellites. In order to set up a comparable test environment, the GPS-signals were received by one single antenna, divided in two data streams by an antenna-splitter and subsequently forwarded to both a GPS/EGNOS receiver and a GPS- receiver with RTCM-input capability. During the trial session also raw data of the rover receivers as well as the reference station will be logged. This allows to verify a posteriori the calculated real-time positions and to test different positioning algorithms using EGNOS correction data by means of the program SISSIM (SISNet Simulation). Additionally an evaluation of the EGNOS ionospheric model will be presented.
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: 2007 Fall Meeting