Beidou non-motorized broadcast ephemeris fault real-time monitoring method

Abstract

The invention discloses a Beidou non-motorized broadcast ephemeris fault real-time monitoring method, which comprises the steps of selecting broadcast ephemeris parameter extrapolation time, and analyzing statistical distribution characteristics of broadcast ephemeris parameter differences; based on sensitivity analysis of satellite positions on broadcast ephemeris parameter changes, obtaining the influence of the broadcast ephemeris parameter changes on the satellite positions, wherein broadcast ephemeris parameters with large influence on the satellite positions adopt a high-order extrapolation mode, and broadcast ephemeris parameters with small influence on the satellite positions adopt a low-order extrapolation mode; and obtaining a threshold value meeting the system requirement according to the required navigation performance requirement, and comparing the threshold value with the test statistic so as to realize the real-time monitoring of the Beidou non-motorized broadcast ephemeris fault. According to the invention, a high-order polynomial and low-order polynomial mixed extrapolation mode is adopted for broadcast ephemeris parameters, so that the low calculation amount is guaranteed while higher-precision satellite position deviation can be obtained, Beidou non-maneuvering broadcast ephemeris faults are effectively monitored, and reference is provided for Beidou broadcast ephemeris fault monitoring.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a method for real-time fault monitoring of Beidou non-motorized broadcast ephemeris, in particular to a method for real-time fault monitoring of Beidou non-motorized broadcast ephemeris based on mixed extrapolation of ephemeris parameters. Background technique [0002] Applying satellite navigation system to aircraft precision approach can effectively improve flight safety and efficiency. The integrity and continuity of aircraft precision approach navigation are the performance requirements that aviation users are most concerned about, and satellite broadcast ephemeris failure is one of the main risk sources affecting aircraft precision approach. In order to ensure the positioning integrity of users related to life safety, monitoring of broadcast ephemeris faults is essential. Broadcast ephemeris faults can be divided into maneuverable broadcast ephemeris faults a...

AI Technical Summary

Problems solved by technology

Since each broadcast ephemeris parameter has a different effect on the satellite position, it is unreasonable to use the same extrapolation method for all parameters

In addition, there are significant differences between the configuration of the Beidou mixed constellation and the orbital coincidence period of satellite movement and the global positioning system, so the traditional non-mobile broadcast ephemeris fault monitoring method cannot be directly applied to the Beidou system

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