Deviation Calibration Method and Device for Radar Differential Reflectivity

A differential reflection and deviation technology, which is applied in the field of deviation calibration of radar differential reflectivity, can solve the problem of poor calibration effect of radar differential reflectivity deviation, and achieve the effect of improving the effect of deviation calibration

Active Publication Date: 2021-06-25
BEIJING METABTAR RADAR
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Problems solved by technology

[0006] This application provides a deviation calibration method and device for radar differential reflectivity, aiming to solve the problem of poor calibration effect of radar differential reflectivity deviation in the prior art

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  • Deviation Calibration Method and Device for Radar Differential Reflectivity
  • Deviation Calibration Method and Device for Radar Differential Reflectivity
  • Deviation Calibration Method and Device for Radar Differential Reflectivity

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[0064] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the 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.

[0065] It can be seen from the background technology that the zenith calibration method used in the prior art can only determine the deviation of the radar differential reflectivity when the radar stops normal operations, so it is difficult to timely measure the deviation of the radar differential reflectivity. Updated so that bias calibration for radar differential reflectivity does not work well. In order to calibrate the deviation of the radar differential reflectivity in time an...

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Abstract

The present application discloses a deviation calibration method and device for radar differential reflectivity, by acquiring each differential reflectivity scanned by radar echoes. In a case where it is determined that the number of range bins of the target radar echo is greater than a preset threshold, the target differential reflectivity is selected from the various differential reflectivities. The ZDR value of the target differential reflectivity is used as the differential reflectivity deviation of the radar echo. A weighted average is performed on the differential reflectivity deviations corresponding to different types of radar echoes to obtain the deviation of the radar differential reflectivity in any radar scanning period. The target deviation is selected from the deviations within the preset time, and the target deviation is used as the deviation of the radar differential reflectivity within the preset time. Compared with the zenith calibration method, there is no need to stop the normal business of the radar, and it is not limited to any weather. Based on the differential reflectivity obtained by radar echo scanning, the deviation of the radar differential reflectivity can be obtained in real time, and the deviation calibration of the radar differential reflectivity can be improved. Effect.

Description

technical field [0001] The present application relates to the technical field of radar detection, in particular to a method and device for offset calibration of radar differential reflectivity. Background technique [0002] Dual-polarization radar is a radar that can transmit and receive both horizontally polarized waves and vertically polarized waves. It is widely used in the field of meteorological detection. As an important observation of dual-polarization radar, differential reflectivity plays a vital role in the process of forecasting weather, and the accuracy of differential reflectivity directly affects the accuracy of 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 also differences in the devices and installations in the two, the differential reflectivity determined by the radar based on the scanning data will produce deviatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 孙召平郭嘉郭泽勇尹春光
Owner BEIJING METABTAR RADAR
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