Positioning method and system based on time difference of global short-wave time service station

By using the time difference information and ionosphere model of the global short-wave timer station, the positioning accuracy problem of satellite navigation systems such as GPS cannot cover or signal disturbance areas is solved, and higher accuracy positioning is achieved and cost is reduced.

CN119780829APending Publication Date: 2025-04-08FOUNDER INT WUHAN
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Patent Information

Application Number
CN202411918195.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-08

AI Technical Summary

Technical Problem

In areas where satellite navigation systems such as GPS cannot cover or signal interference, positioning accuracy issues have always been a challenge.

Method used

By obtaining the coordinate information and time signals of multiple global short-wave time stations, the time difference between the time when the short-wave time signal is received and the standard time is calculated, the geographical location of the receiving end is calculated in combination with the time difference positioning algorithm, and the ionosphere delay error is eliminated through the ionosphere model.

Benefits of technology

It improves positioning accuracy and is suitable for areas where satellite navigation systems such as GPS cannot cover or signal interference, expands the application range of positioning technology and reduces costs.

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Abstract

The invention provides a positioning method and system based on the time difference of global short-wave time service stations, and the method comprises the steps: obtaining the coordinate information of each short-wave time service station, receiving the short-wave time signals of a plurality of short-wave time service stations, and recording the time when each short-wave time signal is actually received; eliminating the delay error of the ionosphere to the short-wave time signal, and calculating the time difference between the time when the short-wave time signal is received and the standard time when the short-wave time signal is broadcasted; and calculating the geographic position of the receiving end by using the time differences and the coordinate information corresponding to the at least three short-wave time service stations in combination with a time difference positioning algorithm. According to the method, the time difference information of a plurality of global short-wave time service stations is combined, the time delay error is eliminated, and the geographic position of the receiving end is calculated by using a time difference positioning algorithm, so that the positioning precision is improved. The method is suitable for an area where a GPS and other satellite navigation systems cannot cover or signals are interfered, the application range of the positioning technology is expanded, and the cost is reduced.
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