Double-star positioning method based on ground cooperation signal

Abstract

The invention discloses a double-star positioning method based on a ground cooperation signal, and the method comprises the steps: firstly transmitting the satellite information and the information of a ground cooperation signal transmission station to an information preprocessing module; secondly calculating the difference of time when the main and auxiliary satellites receive the same cooperation signal and a frequency difference measurement value through the information preprocessing module, and transmitting the time difference and the frequency difference measurement value to an error calculation calculating module; thirdly calculating an error value correlated with the positioning precision through the error calculation calculating module, and transmitting the error value to a signal positioning reprocessing module; and finally solving the precise position of a target source through the signal positioning reprocessing module. The method provided by the invention can effectively correct the relative position error of the main and auxiliary satellites, the system error of the difference of time when the main and auxiliary satellites receive the same cooperation signal, the constellation speed error of the main and auxiliary satellites and the system error of the frequency difference when the main and auxiliary satellites receive the same cooperation signal, thereby finally improving the positioning precision of a double-star positioning system on the target source.

Description

technical field [0001] The invention relates to the technical field of locating ground electromagnetic radiation sources by satellites, in particular to a dual-constellation locating method based on ground cooperation signals. Background technique [0002] The dual-constellation positioning system is mainly used to detect satellite interference signals, and then realize the positioning of the interference source, and can also be used to monitor space electromagnetic signals; the existing dual-constellation positioning system mainly includes ground satellite information receiving modules, information prediction processing module and signal positioning processing module; when using the existing dual constellation positioning system to locate the interference source, the ground satellite information receiving module first needs to receive the original measurement data, satellite information and mission plan from the satellite; Analyze the measurement data and measure signal par...

AI Technical Summary

Problems solved by technology

[0003] However, the positioning accuracy of the dual constellation positioning system for the target is related to many factors such as the constellation position measurement accuracy, the time difference measurement accuracy and the frequency measurement accuracy. The source positioning accuracy has a serious negative impact, which leads to the low positioning accuracy of the dual-constellation positioning system and unreliable positioning results

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