The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2008
Filed:
Apr. 12, 2002
Etienne Dunas, Toulouse, FR;
Philippe Roghi, Cugnaux, FR;
Etienne Dunas, Toulouse, FR;
Philippe Roghi, Cugnaux, FR;
Alcatel, Paris, FR;
Abstract
A system and a method for augmentation of satellite positioning systems wherein a monitoring ground station (MGS) is connected to a computer center in charge of determining the level of error of a satellite (NS) broadcasting positioning signals, and transmitting navigation correction data to a mobile user. The transmission is performed using a digital satellite system using at least one digital satellite (DS) capable of broadcasting multiplexed data in down-link transmission to a user station (U). The user station (U) de-multiplexes and retrieves the navigation correction data from said digital satellite down-link transmission by way of a frame adapter () connected to a satellite receiver (). Specific data such as time or GNSS almanacs are replicated under specific format and put into specific parts of a signaling channel to enable time broadcast to standard receivers of a DS system, and to speed-up acquisition of GNSS satellite signal by standard GNSS receivers possibly in use in the U station. A method is also disclosed for broadcasting time with a reasonable accuracy.