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Autonomous integrity monitoring method and system for satellite-borne navigation receiver

A navigation receiver and integrity monitoring technology, applied in the field of satellite navigation, can solve problems such as failure to effectively find faults and solve abnormality

Active Publication Date: 2020-06-26
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method and system for autonomous integrity monitoring of a satellite-borne navigation receiver, so as to alleviate the problem in the prior art that the signals from less than 5 visible navigation satellites cannot be effectively detected. Find faults and resolve abnormal technical issues

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  • Autonomous integrity monitoring method and system for satellite-borne navigation receiver
  • Autonomous integrity monitoring method and system for satellite-borne navigation receiver
  • Autonomous integrity monitoring method and system for satellite-borne navigation receiver

Examples

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Embodiment 1

[0031] figure 1It is a flow chart of a method for autonomous integrity monitoring of a spaceborne navigation receiver provided according to an embodiment of the present invention, and the method is applied to a spaceborne navigation receiver. Such as figure 1 As shown, the method specifically includes the following steps:

[0032] Step S102, acquiring navigation information of a target satellite; the target satellite is a satellite carried by an on-board navigation receiver, and the navigation information includes: position information and speed information.

[0033] Specifically, the navigation signal of the target satellite is first obtained, wherein the navigation signal is a signal from the navigation satellite; then based on the navigation signal, the position information and velocity information of the target satellite are calculated, wherein the position information is the three-dimensional position information of the target satellite, The speed information is the thr...

Embodiment 2

[0065] Sometimes, the computing power of the space-borne navigation receiver is insufficient, and it is not suitable for direct fitting calculation on the star, and the fitting calculation can be put on the ground. In view of this, the embodiment of the present invention also provides an autonomous integrity monitoring system for satellite navigation receivers, which can put the fitting calculation in the ground operation control center.

[0066] Figure 10 It is a schematic diagram of an autonomous integrity monitoring system for a spaceborne navigation receiver provided according to an embodiment of the present invention. Such as Figure 10 As shown, the system includes: an on-board navigation receiver 100 and a ground operation control center 200 .

[0067] Specifically, the on-board navigation receiver 100 is used to obtain navigation information of the carried target satellite; the navigation information includes: position information and velocity information; and calcu...

Embodiment 3

[0074] Figure 11 is a schematic diagram of a spaceborne navigation receiver provided according to an embodiment of the present invention, such as Figure 11 As shown, the satellite navigation receiver includes: a navigation signal receiving unit 10 , an instantaneous ephemeris calculation unit 20 , a historical data storage unit 30 , an ephemeris fitting calculation unit 40 and a integrity comparison unit 50 .

[0075] Specifically, the navigation signal receiving unit 10 is configured to obtain navigation information of a target satellite; the real-time target satellite is a satellite carried by an on-board navigation receiver, and the navigation information includes: position information and speed information.

[0076] The instantaneous ephemeris calculation unit 20 is configured to calculate the instantaneous orbital elements of the current epoch of the target satellite based on the navigation information. Optionally, the instantaneous ephemeris calculation unit 20 calcul...

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Abstract

The invention provides an autonomous integrity monitoring method and system for a satellite-borne navigation receiver. The method applied to a satellite-borne navigation receiver comprises the following steps: acquiring navigation information of a target satellite; calculating the element number of instantaneous orbits of the current epoch of the target satellite based on the navigation information; acquiring instantaneous orbit elements of a plurality of historical epochs of the target satellite; on the basis of the instantaneous orbital elements of the plurality of historical epochs, fittinga time-varying curve of the orbital elements of the target satellite to obtain a target time curve; and performing autonomous integrity monitoring based on the instantaneous orbital elements of the current epoch and the target time curve to obtain a monitoring result. Therefore, a technical problem that in the prior art, under the condition that signals of less than five visible navigation satellites are received, faults and abnormal calculation cannot be effectively found is solved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method and system for autonomous integrity monitoring of a satellite navigation receiver. Background technique [0002] The integrity monitoring of the spaceborne navigation receiver refers to the ability of the system to notify the user to terminate the signal in time when the navigation system fails or the error exceeds the limit and cannot perform the specified navigation task. It reflects the accuracy of the current calculated position result. When the position error exceeds the given threshold, the alarm will be abnormal. [0003] Autonomous integrity monitoring is one of the important means to ensure the integrity of the satellite navigation system, and it is also the key technology of the navigation receiver. Traditional Receiver Autonomous Integrity Monitoring (RAIM, Receiver Autonomous Integrity Monitoring) is to monitor the integrity of user positioning ...

Claims

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Application Information

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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 陈曦王晓伟冯佳傲魏齐辉詹亚锋
Owner TSINGHUA UNIV