Network RTK user request fast matching method based on row and column number mechanism

Through the network RTK user request fast matching method based on the row and column number mechanism, the grid point closest to the user is found directly using the row and column number mapping, which solves the problem of low efficiency of user request matching in the network RTK system and realizes efficient differential positioning service.

CN116626731BActive Publication Date: 2025-10-21NANJING NORTH OPTICAL ELECTRONICS
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Patent Information

Application Number
CN202211632132.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-19
Publication Date
2025-10-21
Estimated Expiration
2042-12-19

AI Technical Summary

Technical Problem

In the case of a large area and small division interval, the user request matching efficiency in the network RTK differential positioning system is low, resulting in service delays.

Method used

A method based on the row and column number mechanism is adopted. By obtaining satellite ephemeris and reference station data, the grid points are divided and decomposed using the Delaunay triangulation element form. The ambiguity and error between reference stations are calculated, and the pseudorange and carrier phase observation values ​​of the virtual reference station are generated. The row and column number mapping is directly used to find the grid point closest to the user and send the differential correction number.

Benefits of technology

The efficiency of user request matching has been improved, especially in cases where the area is large and the division interval is small, which significantly improves the service efficiency of regional RTK software.

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Abstract

The application discloses a network RTK user request fast matching method based on a row-column number mechanism, comprising the following steps: acquiring satellite ephemeris, reference station original observation values and reference station coordinate data; a grid division module divides regional grid points according to the minimum value of the left lower corner, the maximum value of the right upper corner and the division interval of a reference station group; Delaunay triangular network elements are divided according to the accurate coordinates of the reference station group, and the gravity center coordinates of each triangle are calculated; the ambiguity between reference stations in each triangular network element is calculated according to the division result; the space correlation error values between reference stations are calculated and generated; the pseudo-range observation values and the carrier phase observation values of virtual reference stations are interpolated; all difference correction products are sent to a broadcasting platform; when a user requests product service, the broadcasting platform firstly verifies the user, refuses service if the verification fails, and performs product fast matching if the verification passes; after the matching is completed, the product is broadcast to the user to complete high-precision positioning.
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