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Device for generation of integrity messages signaling nominal, degraded or inactive surveillance stations of satellite navigation systems

A satellite navigation system and integrity technology, applied in the field of integrity messages, can solve problems such as poor adaptability

Inactive Publication Date: 2008-01-09
ALCATEL LUCENT SAS
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  • Abstract
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Problems solved by technology

Therefore, this proves that the mechanism of alerting the user in the form of standard integrity messages is poorly adaptable, not even at all suitable for the situation where the number of satellites monitored by the integrity monitoring part is very high, typically higher than 50

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  • Device for generation of integrity messages signaling nominal, degraded or inactive surveillance stations of satellite navigation systems

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Embodiment Construction

[0026] The object of the present invention is to propose a navigation receiver with integrity monitoring capability of at least one (terrestrial or satellite) integrity monitoring part of a satellite navigation system, so that the navigation receiver can itself determine representative satellite orbit positions and / or synchronization error corrections Integrity data of reliability values ​​for generating navigation information contained in navigation messages broadcast by said satellites.

[0027] In the following, the case of a single satellite navigation system is considered by way of non-limiting example. However, the invention is not limited to a single satellite navigation system. More precisely, it involves integrity monitoring (terrestrial or satellite) of at least one constellation navigation satellite of at least one satellite navigation system, eg two or three, or even more.

[0028] Furthermore, the satellite navigation system considered is the planned GALILEO syst...

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Abstract

A device is dedicated to generating integrity messages relating to at least one satellite navigation system including a set of satellite surveillance stations and to be sent to navigation receivers. The device comprises processor means responsible for determining at chosen times the stations that are active (i.e. nominal or degraded) for each system concerned and, after each such determination, for generating an integrity message including at least primary data representative of the active (i.e. nominal or degraded) stations. The processor means are also responsible, each time they detect that at least one station has become degraded or inactive between two successive chosen times, for generating an integrity alert message including at least primary data representative of each station that has become degraded or inactive. Thus each receiver can determine integrity information relating to the navigation messages that it has received from the satellite navigation system to which it is tuned, given the stations of the system that are actually active (i.e. nominal or degraded) and one or more corresponding integrity degradation rules.

Description

[0001] Cross References to Related Applications [0002] This application is based on French Patent Application No. FR 0652804 filed on July 5, 2006, the entire disclosure of which is hereby incorporated by reference, and the priority of which is hereby claimed under 35 U.S.C. § 119 . technical field [0003] The invention relates to satellite navigation systems (of the RNSS (Radio Navigation Satellite System) or GNSS (Global Navigation Satellite System) type) and, more precisely, to generating, in addition to navigation messages, integrity messages sent to their navigation receivers. [0004] By "satellite navigation system" is meant here a system dedicated to navigation comprising a constellation of satellites in orbit around a celestial body (eg the Earth), a set of satellite monitoring stations (terrestrial or space) and a computer centre. For example, it may be one of the existing systems (GPS, EGNOS, WAAS), or one of the planned systems (GALILEO, COMPASS) or one of thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/14G01S19/08
CPCG01S19/08
Inventor J-L·达米多M·范登博谢J·C·莱维
Owner ALCATEL LUCENT SAS
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