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Navigation integrity monitoring system and method based on leo constellation

A technology of integrity monitoring and low-orbit constellation, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as weak integrity monitoring performance

Active Publication Date: 2018-12-28
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

However, RAIM requires at least 5 visible satellites to complete redundant detection, which has certain requirements for the constellation configuration, and the integrity monitoring performance is relatively weak

Method used

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  • Navigation integrity monitoring system and method based on leo constellation
  • Navigation integrity monitoring system and method based on leo constellation
  • Navigation integrity monitoring system and method based on leo constellation

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Embodiment Construction

[0079] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0080] The navigation integrity monitoring system based on low-orbit constellation consists of two parts: navigation satellite constellation and low-orbit constellation with high-precision integrity monitoring receiver. For example figure 1 As shown, the navigation constellation is the GNSS navigation constellation, and the low-orbit satellite is the Walker constellation. Low-orbit satellites serve as space-based monitoring stations to receive navigation signals and process integrity monitoring data. Finally, through the real-time data aggregation of adjacent low-orbit satellite inter-satellite links, the integrity monitoring information is obtained by fault redundancy voting at every moment Broadcast to global users to achieve global integrity services.

[0081] Due to the multiple redundant observations of low-orbit satellites, faulty navigation sate...

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Abstract

The invention discloses a navigation integrity monitoring system and method based on a leo constellation. The system comprises a plurality of leo satellites; each leo satellite serves as a space-basedmonitoring station to receive a navigation signal; each receiving channel of each leo satellite is provided with a data processing module; the data processing modules perform navigation message integrity monitoring and observed quantity integrity monitoring on the received navigation signals, and communicate with the leo satellites which can observe the same navigation satellite nearby through inter-satellite links; and redundancy judgment is carried out on processing results of all the leo satellites capable of observing the same navigation satellite through a comprehensive processing logicmodule arranged on any leo satellite, thereby giving a final navigation integrity monitoring result.

Description

technical field [0001] The invention designs a satellite navigation technology, and in particular relates to a navigation integrity monitoring method based on a constellation of low-orbit satellites. Background technique [0002] Integrity is one of the core service performances of satellite navigation systems, which refers to the ability of the system to issue timely alarms when the navigation system service error exceeds the limit or cannot provide services. With the development of the global satellite navigation system (GNSS) to today, the guarantee of global integrity service has become a bottleneck restricting its further application. [0003] Currently, GNSS integrity monitoring is divided into four parts: [0004] (1) Global System Layer Integrity Monitoring [0005] The integrity monitoring of the global system level is based on the errors existing in satellites in the GNSS signal transmission segment. The main processing errors include satellite orbit errors, sate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 边朗贾亦哲蒙艳松严涛王瑛雷文英韩琳
Owner XIAN INSTITUE OF SPACE RADIO TECH
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