Pseudo-range deviation calculation and correction method and device based on receiver

Abstract

The invention provides a pseudo-range deviation calculation and correction method and device based on a receiver, and the method comprises the steps: carrying out the preprocessing of observation data, and determining the altitude angles of all satellites of all epochs; determining a reference satellite of an inter-satellite single difference, and eliminating observation data smaller than a firstthreshold value according to each satellite altitude angle of each epoch; subtracting the theoretical satellite-ground distance from the inter-satellite single difference of the pseudo-range observation value, eliminating a common error related to the receiver, and obtaining a single difference sequence of the difference between the pseudo-range observation value and the theoretical distance; solving an inter-station difference based on the single difference sequence, eliminating a common error related to a satellite end, and eliminating an error term which does not meet a second threshold requirement; obtaining pseudo-range deviation by adopting a method of taking an average value of an arc section; and adding / or subtracting the pseudo-range deviation to the pseudo-range observation valueof the observation data according to the reference of receiver differential calculation. According to the scheme of the invention, the pseudo-range deviation can be effectively calculated, the precision of a positioning result is improved, and a reliable and efficient pseudo-range deviation extraction effect is obtained.

Description

technical field [0001] The invention relates to the field of satellites, in particular to a receiver-based pseudo-range deviation calculation and correction method and device for a satellite navigation system. Background technique [0002] In the early research on the signal anomaly of the GPS system PRN-19 satellite, it was found that the navigation signal of the navigation satellite is affected by the satellite generator, signal link, etc., and a constant property will be generated when the receiver with different configuration parameters receives the same satellite downlink signal This deviation is called pseudo-range deviation. In the case of measurements on the PRN-19 satellite, the impact of this deviation on positioning is within the specified range when using single-frequency receivers, while using differential equipment, different receivers produced position deviations of 3 to 8 meters. Subsequent studies have shown that the current satellite navigation systems, su...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention proposes a receiver-based method and device for calculating and correcting pseudorange deviations. The method and device are used to solve the problem of finding pseudoranges from the source of pseudorange signals in the prior art The cause of the deviation, by changing the relevant parameters of the hardware facilities to restore the signal before the distortion is cumbersome and inaccurate in practical applications

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