Advanced timing receiver autonomous integrity monitoring method, device, equipment and storage medium

By using dual-frequency and multi-constellation signals in the satellite navigation system, combined with the correction number and integrity information of the Beidou-based enhancement system, the problems of ionosphere error and inter-system deviation in the timing service are solved, and high-precision and high-reliability timing services are achieved.

CN118642129BActive Publication Date: 2025-03-18BEIHANG UNIV
2 Cites 0 Cited by

Patent Information

Application Number
CN202410913777.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-03-18
Estimated Expiration
2044-07-09

AI Technical Summary

Technical Problem

The prior art is difficult to ensure reliability in the timing service of satellite navigation systems, especially under the influence of ionosphere errors and inter-system deviations, resulting in insufficient accuracy and reliability of timing solutions.

Method used

Dual-frequency signals and multi-constellation signals are used to eliminate ionosphere errors, enhance satellite geometry and observation redundancy, and use the correction number and corresponding integrity information propagated by the Beidou-based enhancement system to optimize the weight array and fault detection algorithm.

Benefits of technology

It significantly improves the accuracy and reliability of timing services, enhances the availability of T-RAIM algorithm, reduces the computing load, and is suitable for timing integrity monitoring of larger-scale constellations in the future.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention discloses an autonomous integrity monitoring method, device, equipment and storage medium for an advanced timing receiver, the method comprising: constructing a fault subset, smoothing pseudorange observation values ​​according to the carrier phase of the receiver to obtain a prior residual, using integrity support information and integrity parameters broadcast by the Beidou satellite-based augmentation system to calculate the residual weight matrix of the pseudorange, using a weighted least squares estimator to estimate the timing solution of the full-view subset composed of all visible satellites and the timing solution of all fault subsets; performing fault detection based on solution separation hypothesis detection for each fault-tolerant timing solution and a chi-square test for the full-view timing solution; in the case where the fault detection passes, calculating the timing protection level according to the integrity risk budget, and determining the availability of the timing service. The present invention eliminates the largest error source in the timing process, the ionospheric error; and adopts multi-constellation signals to greatly enhance satellite geometry and observation value redundancy.
Need to check novelty before this filing date? Find Prior Art