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

A deviation calculation and receiver technology, which is applied in the satellite field, can solve problems such as inaccuracy and cumbersome signals, and achieve the effect of efficient extraction and precision improvement

Pending Publication Date: 2021-03-09
AEROSPACE INFORMATION RES INST CAS
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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 pseudor...

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

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Embodiment Construction

[0032] combine first figure 1 The flow chart of the receiver-based pseudorange bias calculation and correction method according to an embodiment of the present invention is illustrated. Such as figure 1 As shown, the method includes the following steps:

[0033] Step S101: configure the GNSS receiver of the zero-baseline combination, obtain the observation data of the GNSS receiver of the zero-baseline combination, and extract the pseudo-range observation data corresponding to the frequency point; preprocess the GNSS observation data, and determine the height of each satellite in each epoch horn;

[0034] Step S102: Based on the satellite type and satellite system, determine the single-difference reference satellite between the satellites, and eliminate the pseudo-range observation values ​​smaller than the first threshold according to the altitude angles of the satellites in each epoch;

[0035] Step S103: Subtract the theoretical satellite-ground distance from the pseudo-...

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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...

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Application Information

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IPC IPC(8): G01S19/39G01S19/40
CPCG01S19/396G01S19/40
Inventor 李子申李冉李阳王宁波王志宇
Owner AEROSPACE INFORMATION RES INST CAS
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