HR: 09:30h
AN: G11A-07    [Abstracts]
TI: Combined processing of observations from different Global Navigation Satellite Systems
AU: * Springer, T
EM: Tim.Springer@esa.int
AF: European Space Operations Center, Robert Bosch Strasse 5, Darmstadt, 64293, Germany
AU: Dow, J
EM: John.Dow@esa.int
AF: European Space Operations Center, Robert Bosch Strasse 5, Darmstadt, 64293, Germany
AU: Sanchez, J F
EM: Jaime.Fernandez@esa.int
AF: European Space Operations Center, Robert Bosch Strasse 5, Darmstadt, 64293, Germany
AU: Romero, I
EM: nacho@canaryadvancedsolutions.com
AF: Canary Advanced Solutions, Robert Bosch Strasse 5, Darmstadt, 64293, Germany
AB: The upcoming the Galileo GNSS and the modernisation of the GPS and Glonass systems offers many exciting opportunities and challenges in the field of geosciences in the next decade. However, in order to obtain any positive effects on our geodetic and geophysical estimates the different GNSS systems will have to be observed by multi system receivers that track all systems on all available frequencies. Furthermore, these receivers should not introduce any biases between the tracked GNSS observations. In addition to this we need analysis software that can efficiently handle these multi-system and multi-frequency observations in one single estimation process. Over the last two years ESOC has put a significant effort into its Napeos processing software. This software is now capable of combined processing of SLR, DORIS, GPS, GLONASS, and GIOVE-A data. It is routinely used for a large number of tasks within ESOC, e.g., Envisat POD, GIOVE-A orbit predictions for SLR, and for the ESOC contributions to the Galileo Geodetic Service Provider. Furthermore, it will soon officially be used for generating all the ESOC products for the International GNSS Service (IGS). In our presentation we will show results from our combined GNSS analysis, both the combination of GPS and GLONASS as well as the combination of GPS and GIOVE-A. We will focus on the challenges and we were, and in part still are, faced with when combining the data of different GNSS. We will demonstrate that at present both GLONASS and GIOVE-A do not offer any benefits for our estimates. We will conclude our contribution with a discussion on the requirements which need to be fulfilled to be able to really benefit from a combined processing of multi Global Navigation Satellite Systems.
DE: 1200 GEODESY AND GRAVITY
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
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