Single-frequency precise global positioning system for block ionosphere modeling correction

Abstract

According to the single-frequency precise global positioning system for block ionosphere modeling correction, continuous tracking station measurement data is used for assisting single-frequency measurement data precise positioning, the characteristics of multiple deviations such as ionosphere delay and the like in single-frequency precise positioning and corresponding correction measures are analyzed, and the accuracy of the single-frequency precise global positioning system for block ionosphere modeling correction is improved. In order to solve the problem that ionosphere deviation delay in single-frequency measurement data cannot be effectively corrected, a block ionosphere model is established by using measured data of a base station, and ionosphere deviation in the single-frequency measurement data is accurately corrected according to the block ionosphere model. Theoretical derivation and actual example analysis are carried out on double-frequency measurement data modeling and single-frequency measurement data modeling, the approximate residual deviation of the base station and the single-frequency moving station is analyzed, and the positioning precision of the single-frequency moving station can be greatly improved based on the residual deviation.

Description

technical field [0001] The application relates to a single-frequency precise global positioning system, in particular to a single-frequency precise global positioning system for block ionospheric modeling and correction, which belongs to the technical field of precise satellite positioning. Background technique [0002] GPS has real-time, global, continuous and precise navigation, positioning and timing functions, and has been widely used in many fields such as land and earth science, resources and environment, transportation, precision agriculture, and disaster forecasting. At present, the high-precision global positioning system positioning solution method mainly adopts the relative positioning method, based on the high correlation of the deviation of the synchronous measurement value, the difference between the measurement values ​​is used to eliminate the correlation deviation, and the accuracy and reliability are high. However, there are obvious deficiencies such as low...

AI Technical Summary

Problems solved by technology

[0013] In view of the deficiencies of the existing technology, the single-frequency precise global positioning system provided by this application for block ionospheric modeling and correction generally adopts dual-frequency receivers for the precise positioning of current global positioning systems, but the price of dual-frequency receivers is relatively expensive In order to solve the problem, the development and use of low-cost single-frequency receivers to achieve high-precision positioning, especially successfully solved the use of single-frequency receiver data to eliminate the impact of ionospheric delay deviation; for the ionosphere that has a greater impact in single-frequency precise positioning The problem that the deviation delay cannot be effectively corrected, the research and development of the ionospheric delay correction method to improve the positioning accuracy of single-frequency measurement data, this application has very important value in terms of scientific research applications and social and economic development needs. The method has small limitations, is universal and portable, has great potential for promotion and application, and has broad market application prospects

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