Un-differentiated GPS and Galileo data processing with Ambiguity Resolution using IGS products: results and perspectives
Abstract
Resolving GNSS phase observations biases to their correct integer values significantly improves the precision and the accuracy of the estimated parameters. The un-differentiated approach requires to deal with remaining "hardware" biases at the satellite and receiver level. Nevertheless, several groups within the IGS community are able to exploit this approach whether to estimate precise satellite orbit and clock products and/or to use these products for various applications like PPP, LEO POD or time transfer. If un-differentiated GPS processing is well established since a decade, more recent publications have demonstrated that a similar approach ca be applied to Galileo observations opening the door to hybridization of the two systems.
Thanks to the 3rd reprocessing effort in the frame of the IGS contribution to the ITRF2020, combined GPS-Galileo products will be available during the most recent period allowing new investigations and applications. More than 2 years of GPS alone, Galileo alone and GPS+Galileo data have been processed by the CNES-CLS IGS Analysis Center. In this presentation, the quality evaluation of the corresponding ambiguity, orbit, clock, station residuals, and EOP solutions will be compared. The interest of hybridizing GPS and Galileo is also quantified through static and cinematic PPP-AR results.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.G21C0747P
- Keywords:
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- 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions;
- GEODESY AND GRAVITY;
- 1229 Reference systems;
- GEODESY AND GRAVITY;
- 1241 Satellite geodesy: technical issues;
- GEODESY AND GRAVITY;
- 1243 Space geodetic surveys;
- GEODESY AND GRAVITY