Thales

Alcatel Lucent

Bernard Charlot

Etienne Dunas

Sebastien Trilles

Eric Chambre

Gonzagues Bertin De La Hautiere

Sébastien Trilles

Céline Benassy Foch

M Gonzagues Bertin De La Hautiere

A space based or aeronautical augmentation system comprises space based or aeronautical broadcasting means adapted for retransmitting streams of messages NOF m.j transmitted by broadcasting ground stations, one or more observation and reception ground stations for signals transmitted by the satellites of the GNSS global navigation system and by the N space based or aeronautical broadcasting means. The space based or aeronautical augmentation system further comprises K computation centres, located on geographically remote sites, and each configured to formulate i-th streams of messages NOF i.j, j varying from 1 to j, such that all the data streams NOF i.j, independently of the computation centre CPF#i which formulate them, comprises one and the same sequence of types MTs of messages, which is independent of the space based or aeronautical broadcasting means.

Space based or aeronautical augmentation system with simplified management of its navigation messages

A space-based augmentation system improving the accuracy and reliability of satellite navigation system data includes, each at least: a ground station transmitting data to satellites, a ground station receiving signals transmitted by a satellite and by a satellite equipped with transmitting/receiving means for transmitting data received from the ground transmitting station for a given geographical area; two ground computing centers, redundantly and respectively calculating navigation message streams and transmitting to the ground transmitting station navigation message streams and information representative of Quality of Service provided by the system, from signals transmitted by the ground receiving stations. The computing centers, ground receiving station and ground transmitting station are connected by a communication network. The ground transmitting station selects navigation message streams of a master computing center according to information representative of respective Quality of Service of said computing centers, and said computing centers are synchronized on said master computing center.

Space based augmentation system adapted for improving the accuracy and reliability of data provided by a satellite navigation system and associated method

The invention relates to a data server () used in a system () for supplying complementary data, so-called augmentation data, for satellite navigation signals. The inventive server () is especially adapted to be used with elements that are compatible with those used in EGNOS technology (European Geostationary Navigation Overlay Service). Said system () for supplying augmentation data for the satellite navigation signals comprises at least one calculator () for the determination of said augmentation data, said augmentation data being determined from data transmitted by at least one receiving station (S. . . SON) receiving navigation information sent by means of at least one satellite. Said server () comprises a first inlet () for receiving the augmentation data transmitted by the calculator (), a first outlet () for transmitting the augmentation data towards at least one user (U. . . UOK), and a second outlet () for re-emitting the augmentation data towards the calculator () with a delay that is pre-determined in relation to the reception at the first inlet ().

Data server used in a system for supplying augmentation data for the satellite navigation signals

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Toulouse, France

Bernard Charlot