Apparatus and process for a global navigation satellite system meeting safety of life performance requirements

• US 20070285310A1
• Filed: 03/21/2007
• Published: 12/13/2007
• Est. Priority Date: 03/22/2006
• Status: Active Grant

• Current Assignee: Eads Astrium GmbH
• Original Assignee: Eads Astrium GmbH
• Inventors: Favin-Leveque, Hugues, Boutteau, Bertrand, Trautenberg, Hans
• Granted Patent: US 7,576,691 B2
• Time in Patent Office: Days
• US Class Current: 342/357.450
• CPC Class Codes: G01S 19/08 providing integrity information, e.g. health of satellites or quality of ephemeris data
• CPC Class Codes: G01S 19/20 Integrity monitoring, fault detection or fault isolation of space segment

Abstract

A satellite system for providing a navigation service includes a ground segment and a user segment. The ground segment provides information to enable the user segment to autonomously determine the user position performance.

Claims

1. A satellite system for providing a navigation service comprising a ground segment and a user segment, wherein the ground segment provides information to enable the user segment to autonomously determine user position performance.

2. The satellite system according to claim 1, wherein the information is broadcast to the user segment via a broadcast process.

3. The satellite system according to claim 2, wherein the broadcast process comprises one of i) a satellite, ii) a terrestrial communication means;

and iii) a combination of satellites and terrestrial communication means for broadcasting the information to the user segment.

4. The satellite system according to claim 1, wherein the ground segment comprises a SiS continuity risk assessment that determines at least one of a signal in space continuity, a SiS integrity risk assessment determining a signal in space static integrity, and a signal in space dynamic integrity.

5. The satellite system according to claim 1, wherein the user segment comprises a user position continuity risk assessment that determines a user position continuity risk.

6. The satellite system according to claim 1, where the information comprises at least one of the parameters i) signal in space accuracy, ii) signal in space continuity, iii) signal in space static integrity, iv) signal in space dynamic integrity, v) signal in space monitoring accuracy, vi) signal in space alert limit, vii) time to alert, and viii) signal in space variation rate limit.

7. The satellite system according to claim 1, wherein user position performance comprises at least one of the parameters user position continuity risk and user position integrity risk.

8. A process for determining an integrity risk and a continuity risk for a satellite system comprising:

a ground segment determines information needed for a user position performance;

the ground segment broadcasting the information to a user segment; and

the user segment autonomously determining the user position performance.