Differential reflectivity ZDR calibration method and apparatus

A technology of differential reflection and calibration method, which is applied in the field of communication and can solve problems such as ZDR deviation update

Active Publication Date: 2019-03-26
BEIJING METABTAR RADAR
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Problems solved by technology

In addition, since the ZDR can only be calibrated when the radar stops normal operations, it is difficult to update the ZDR deviation in a timely manner by using the zenith calibration method. The case where the deviation is calibrated against the ZDR

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  • Differential reflectivity ZDR calibration method and apparatus
  • Differential reflectivity ZDR calibration method and apparatus
  • Differential reflectivity ZDR calibration method and apparatus

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[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0026] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such th...

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Abstract

The embodiment of the application discloses a differential reflectivity ZDR calibration method. Complex I / Q signals of a horizontal channel and a vertical channel that correspond to each distance library in each radial direction are obtained; according to complex I / Q signals of the horizontal channel and the vertical channel corresponding to each distance library as well as horizontal channel radial noises, ZDR related data corresponding to each distance library are calculated correspondingly; on the basis of Bragg scattering features and the ZDR related data corresponding to all distance libraries, target distance libraries are screened among all distance libraries and thus a target distance library set is formed; whether the target distance library set meets the ZDR deviation evaluationstandard is determined; and if so, ZDR deviation for calibrating the ZDR is determined based on the ZDR related data corresponding to each target distance library in the target distance library set. When the method is used for calibrating the ZDR, normal services performed by the radar do not need to be stopped and real-time updating of the ZDR deviation is realized.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a calibration method and device for differential reflectivity ZDR. Background technique [0002] Dual-polarization radar is a radar that can transmit and receive horizontally polarized waves and vertically polarized waves. It is widely used in the field of meteorological detection; It plays a vital role in the process of forecasting the weather. Whether the ZDR can be accurately calibrated directly affects the accuracy of the weather forecast. [0003] However, since the horizontal channel and the vertical channel of the dual-polarization radar are usually not guaranteed to be completely consistent, and there are certain differences in the devices and installations in the two, there will be systematic deviations in the ZDR determined based on the measured data. , the ZDR needs to be revised. In addition, affected by factors such as system operation, device a...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 陈艳孙召平张持岸
Owner BEIJING METABTAR RADAR
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