Positioning method and device based on low-orbit predicted ephemeris and real-time ephemeris of beidou-3

By combining low-orbit predicted ephemeris data with BeiDou-3 real-time ephemeris data, the problem of GNSS system positioning interruption in harsh environments was solved, and stable positioning services were achieved under interference conditions, improving the system's anti-interference capability and positioning reliability.

CN122330933APending Publication Date: 2026-07-03CHANGSHA HAIGE BEIDOU INFORMATION TECH CO LTD
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Patent Information

Application Number
CN202610471599.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-10
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing GNSS systems are susceptible to interference in harsh environments, leading to positioning interruptions, and the vulnerability of relying on a single constellation and real-time ephemeris decoding has not been effectively addressed.

Method used

By employing dual-source ephemeris data based on low-orbit predicted ephemeris and BeiDou-3 real-time ephemeris, and through parallel acquisition, preprocessing, and quantification of signal quality assessment, anti-interference mode determination and dynamic weighted fusion positioning calculation are performed to achieve seamless continuity of positioning services.

Benefits of technology

Even when GNSS signals are subjected to continuous, high-intensity interference, it can still provide stable positioning services, improving anti-interference capabilities and positioning reliability, and ensuring the continuity and accuracy of positioning services.

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Abstract

This application relates to the field of global satellite navigation technology and discloses a positioning method and apparatus based on predicted ephemeris data from low-Earth orbit (LEO) satellites and real-time ephemeris data from BeiDou-3 satellites. The method utilizes dual-source ephemeris data, including predicted ephemeris data from LEO satellites and real-time ephemeris data from BeiDou-3 satellites. The method comprises: parallel acquisition and preprocessing of the dual-source ephemeris data to obtain a real-time signal; quantitative evaluation of the real-time signal quality to obtain a real-time quality factor; obtaining the overall health of the BeiDou-3 satellites based on the real-time quality factor; determining an anti-interference mode based on the overall health of the BeiDou-3 satellites, the number of visible BeiDou-3 satellites, and a preset threshold; and performing dynamic weighted fusion positioning calculation between the two sources of ephemeris based on the result of the anti-interference mode determination, outputting the positioning result. The apparatus corresponds to this method. This application solves the technical problem of ensuring uninterrupted positioning function when GNSS signals are subjected to continuous, high-intensity interference.
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