GNSS (Global Navigation Satellite System) real-time precise single-point positioning ambiguity fixing method for complex environment

By combining LAMBDA and BIE methods, GNSS real-time precision single-point positioning ambiguity fixation is improved, which solves the problems of low ambiguity floating-point solution accuracy and slow convergence speed in complex environments, and achieves higher positioning accuracy and reliability.

CN120352905APending Publication Date: 2025-07-22GUIZHOU BRIDGE CONSTR GROUP
0 Cites 4 Cited by

Patent Information

Application Number
CN202510326865.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-19
Publication Date
2025-07-22

AI Technical Summary

Technical Problem

In complex environments, the existing GNSS real-time precision single-point positioning ambiguity fixing method has problems such as low ambiguity floating point solution accuracy, slow convergence speed, and low fixation success rate of traditional BIE methods.

Method used

The improved LAMBDA method is used in combination with the BIE method, and the satellite orbit and clock difference are obtained, and the non-difference ambiguity is solved by obtaining the original observation data and correction numbers, and the non-difference ambiguity is performed. The inter-star single difference method is used to fix the wide lane ambiguity, and the narrow lane ambiguity is optimized through the BIE method. Finally, the ambiguity subset is iteratively selected based on the optimal aperture detection criteria.

Benefits of technology

It improves the ambiguity fixed success rate and convergence speed, improves the GNSS positioning accuracy and reliability, and is suitable for real-time precision single-point positioning in complex environments.

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

Abstract

The invention relates to the technical field of GNSS (Global Navigation Satellite System) navigation and positioning, in particular to a GNSS real-time precise single-point positioning ambiguity fixing method for a complex environment. The method comprises the steps of obtaining and processing data, obtaining a precision satellite orbit and a precision satellite clock error from original observation data, broadcast ephemeris and an SSR correction number which are originally obtained in sequence, obtaining original frequency point non-difference floating point ambiguity, obtaining fixed integer inter-satellite single-difference wide-lane ambiguity, and obtaining floating point inter-satellite single-difference narrow-lane ambiguity. And finally, selecting the complete set ambiguity according to the precision index of the floating point narrow lane ambiguity, and carrying out iteration to obtain an ambiguity subset meeting the optimal aperture check rule. Through the method, the ambiguity fixing reliability can be further improved, and the convergence time is shortened.
Need to check novelty before this filing date? Find Prior Art