New space GNSS navigation experiments

Jean-Luc Issler, Laurent Lestarquit, Michel Grondin, Marie-Claire Charmeau, Denis Laurichesse

Abstract:	CNES ( The French Space Agency) enter in an active GPS space navigation experiments period. The use of GPS has been decided for operational navigation of the CNES/Alcatel PROTEUS platform. CNES also decided to participate in the GPS navigation experiment of the ARD capsule (Atmospheric Reentry Demonstrator : ESA/CNES program) launched by the third ARIANE 5. The successful GPS navigation and raw measurements results in orbit and during the reentry are presented, as the details of the threshold improvement signal processing technique used in the ARD GPS receiver. The new GPS space navigation experiments prepared arealso detailed, as threshold and multipath errors reduction techniques implemented in the used receivers, improved compared to the one implemented in the ARD receiver. The fwst experiment is the GPS navigation and timing of the HETE2 spacecraft. The receiver includtithe DIOGENE orbital navigator ( : Immediate Orbit Determination on board a GNSS receiver ) developed by CNES. The receiver navigation performanc~has been tested using a GPS simulator, and are presented. The second experiment is STENTOR, a geostationary satellite earring a different GNSS receiver, also provided with DIOGENE. This equipment will be used in GTO and in GEO. GPS satellites and ground pseudolites will be tracked in GEO. The third experiment will be in LEO, on a microsatellite called DEMETER. Acquisitions with very low thresholds will be used, as DIOGENE.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	435 - 444
Cite this article:	Issler, Jean-Luc, Lestarquit, Laurent, Grondin, Michel, Charmeau, Marie-Claire, Laurichesse, Denis, "New space GNSS navigation experiments," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 435-444.
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