Beidou navigation satellite real-time rapid high-precision positioning method based on wind cloud satellite

By combining data from Fengyun satellites and ERA5, and using the TimeMixer model to predict ZWD and ionospheric delay parameters, the problem of slow convergence speed in PPP positioning of BeiDou navigation satellites was solved, enabling fast and high-precision positioning with a low-cost receiver, which is suitable for civilian applications of the BeiDou system.

CN121978727AActive Publication Date: 2026-05-05HANGZHOU DIANZI UNIV
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Patent Information

Application Number
CN202610450303.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-05-05
Estimated Expiration
2046-04-08

AI Technical Summary

Technical Problem

The existing BeiDou navigation satellite real-time PPP positioning technology has a bottleneck in convergence time, especially in the context of low-cost receivers, making it difficult to achieve fast and high-precision positioning. This is mainly because ZTD and ionospheric delay parameters are difficult to estimate effectively.

Method used

By combining Fengyun satellite and ERA5 data, and through multi-source data complementarity and the TimeMixer prediction model, the ZWD and ionospheric delay parameters are extracted from Fengyun satellite data as known quantities. The TimeMixer model is used for short-term ZWD prediction, and Shepard interpolation and bilinear interpolation are used for elevation correction to construct a fast and high-precision PPP positioning method.

Benefits of technology

It significantly improves the positioning convergence speed and accuracy of low-cost BeiDou receivers, achieving fast and high-precision real-time positioning. It solves the problem of slow convergence speed caused by high parameter dimensionality in traditional methods, ensuring the real-time performance and stability of positioning.

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Abstract

The invention discloses a Beidou navigation satellite real-time rapid high-precision positioning method based on a wind cloud satellite, and the method comprises the steps: collecting the real-time atmospheric precipitable water amount and land surface temperature data of the wind cloud satellite, obtaining a water vapor conversion coefficient through the land surface temperature data, and converting the atmospheric precipitable water amount into zenith wet delay through the water vapor conversion coefficient; then collecting real-time electron density profile data of the wind cloud satellite to obtain the total electron content of an occultation point in the zenith direction, and obtaining the oblique total electron content by adopting a Shepard interpolation method and a mapping relation algorithm; and constructing and training a TimeMixer time sequence prediction model, using the trained TimeMixer model to the zenith wet delay at the current moment, and combining the position of the Beidou receiver, so that the Beidou receiver preferentially adopts the zenith wet delay calculated by the wind cloud satellite to carry out PPP positioning calculation. According to the method, the performance of the low-cost Beidou receiver is remarkably improved, and rapid and high-precision positioning is realized.
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