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GPS (Global Positioning System) and BeiDou regional system combined constellation fault detection and elimination method and device

A fault detection and regional technology, applied in the field of satellite navigation, to achieve the effect of ensuring the availability of satellite navigation and improving the integrity

Inactive Publication Date: 2015-10-14
BEIHANG UNIV
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Problems solved by technology

[0005] The present invention provides a GPS and Beidou regional system combined constellation fault detection and troubleshooting method and device to solve the problem of how to perform fault detection and troubleshooting under the GPS and Beidou regional system combined constellation

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  • GPS (Global Positioning System) and BeiDou regional system combined constellation fault detection and elimination method and device

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[0060] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0061] For the existing GPS navigation and positioning, the probability of GPS satellite failure is no more than three times a year for the entire constellation, and for users, the probability of one satellite failure per hour is less than 10 -4 / h, while the integrity risk requirement from the route to the Non-Precision Approach (Non-Precision Approach, NPA) stage is 10-7 / h. Therefore,...

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Abstract

The invention provides a GPS (Global Positioning System) and BeiDou regional system combined constellation fault detection and elimination method and a device. The method comprises steps: the number of visible BDS (BeiDou Navigation Satellite System) satellites and the number of visible GPS satellites at present are determined; when the number of visible BDS satellites is no smaller than 4 but no larger than 6, RAIM (Receiver Autonomous Integrity Monitor) algorithm is used for carrying out fault detection and elimination on the visible GPS satellite set, and a GPS satellite set after fault elimination is obtained, wherein the visible GPS satellite set is a set formed by the visible GPS satellites; the number of satellites in the visible BDS satellite set is expanded to be M according to the GPS satellite set after fault elimination to obtain a BDS satellite set after expansion, wherein M is larger than 6, and the visible BDS satellite set is a set formed by the visible BDS satellites; and fault detection and elimination under the double-satellite assumption are carried out on the BDS satellite set after expansion. Thus, fault detection and elimination under the GPS and BeiDou regional system combined constellation are realized, integrity is improved, and satellite navigation availability in a high safety requirement condition can be effectively ensured.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method and device for detecting and eliminating faults in a combined constellation of GPS and Beidou regional system. Background technique [0002] With the vigorous development of the satellite navigation industry, my country has built the BeiDou Navigation Satellite System (hereinafter referred to as: BDS) in recent years, which has provided regional navigation services for the Asia-Pacific region, and plans to realize global services in 2020. The global satellite navigation system is developing in the direction of multi-constellation combination. The combination of Global Positioning System (Global Positioning System, hereinafter referred to as: GPS) and BDS can improve the accuracy, integrity, continuity and availability of aviation navigation services. In order to ensure the reliability of the navigation service used in key occasions, it is necessary to evalua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 王志鹏朱衍波张思达
Owner BEIHANG UNIV
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