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Method and system for calibrating system differential phase shift of dual polarization radar

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

Active Publication Date: 2017-05-31
BEIJING METABTAR RADAR
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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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  • Method and system for calibrating system differential phase shift of dual polarization radar
  • Method and system for calibrating system differential phase shift of dual polarization radar
  • Method and system for calibrating system differential phase shift of dual polarization radar

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to 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 one scan, determine the distance library of the ground clutter in the echo;

[0043] In practical applications, optionally, a method for calibrating the system differential phase shift of the dual-polarization radar provi...

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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 radars. Background technique [0002] For atmospheric monitoring, dual polarization radars are often used to scan the atmosphere. Dual polarization radar can transmit and receive both horizontally polarized waves and vertically polarized waves. Technologists can conduct studies such as precipitation estimation through the differential phase shift between the received horizontally polarized wave and the received vertically polarized wave. Due to the existence of systematic differential phase shift, the differential phase shift cannot be zero when the horizontally polarized wave and the vertically polarized wave are emitted. That is, the systematic differential phase shift reduces the accuracy of the differential phase shift between the received horizontally polarized wave and the...

Claims

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Application Information

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