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System differential phase shift calibration method and system for dual polarization radar

A differential phase shift and dual polarization technology is applied in the field of system differential phase shift calibration of dual polarization radar, which can solve the problem that the accuracy of system differential phase shift cannot be guaranteed.

Active Publication Date: 2019-11-15
BEIJING METABTAR RADAR
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  • Description
  • Claims
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Problems solved by technology

Of course, the method of manual estimation is also affected by the experience of the estimator, resulting in the accuracy of the differential phase shift of the system cannot be guaranteed

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  • System differential phase shift calibration method and system for dual polarization radar
  • System differential phase shift calibration method and system for dual polarization radar
  • System differential phase shift calibration method and system for dual polarization radar

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0041] Such as figure 1 As shown, the embodiment of the present invention provides a system differential phase shift calibration method for dual polarization radar, which may include:

[0042] S100. After the dual polarization radar performs a scan, determine the distance library of the ground clutter in the echo;

[0043] In practical applications, optionally, the system differential phase shift calibration method of a dual-polarization rad...

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Abstract

The invention provides a method and a system for calibrating the differential phase shift of dual polarization radar. The method comprises the steps of calculating differential phase shifts of range bins of ground clutters, and storing the differential phase shift with the highest occurrence frequency; calculating the standard deviation of differential phase shifts stored within the latest first time length; if the standard deviation calculated at the present time is less than a preset standard deviation threshold, when the difference between the differential phase shift stored at the present time and the current system differential phase shift is greater than a preset threshold, updating the current system differential phase shift to be the differential phase shift stored at the present time; and if the standard deviation calculated at the present time is greater than the preset standard deviation threshold, comparing the current system differential phase shift with a maximum value of differential phase shifts stored within a latest second time length and a minimum value of the differential phase shifts stored within the latest second time length, and if the current system differential phase shift is greater than the maximum value or less than the minimum value, updating the current system differential phase shift to be an average value of the differential phase shifts stored within the latest second time length. The system differential phase shift can be updated timely according to the method provided by the invention.

Description

Technical field [0001] The invention relates to the technical field of atmospheric monitoring, in particular to a system differential phase shift calibration method and system for dual-polarization radar. Background technique [0002] For atmospheric monitoring, dual-polarization radar is often used to scan the atmosphere. Dual polarization radar can transmit and receive horizontally polarized waves as well as vertically polarized waves. Technicians can perform studies such as precipitation estimation by using the differential phase shift between the received horizontally polarized wave and the received vertical polarized wave. Due to the existence of the differential phase shift of the system, horizontally polarized waves and vertical polarized waves cannot achieve zero differential phase shift during emission. That is, the system differential phase shift reduces the accuracy of the differential phase shift between the received horizontally polarized wave and the received vert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 孙召平陈艳
Owner BEIJING METABTAR RADAR
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