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Correction method and system for radar reflectivity factors of dual polarization radar

A radar reflection and dual-polarization technology, applied in the field of atmospheric science, can solve problems such as difficulty in complete compliance, achieve the effects of reducing errors, realizing attenuation correction, and ensuring effectiveness

Pending Publication Date: 2019-04-09
BEIJING INST OF RADIO MEASUREMENT
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Problems solved by technology

Using a fixed coefficient, it is difficult to completely match the different precipitation processes in different regions, and there will be a large error

Method used

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  • Correction method and system for radar reflectivity factors of dual polarization radar
  • Correction method and system for radar reflectivity factors of dual polarization radar
  • Correction method and system for radar reflectivity factors of dual polarization radar

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Embodiment Construction

[0046]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0047] In the research of the attenuation correction method, the inventor of the present application also found that terrain (such as high mountains), buildings, trees, etc. will cause partial or complete occlusion of radar rays, which will limit the effective coverage of radar data and cause radar damage. The parameters have deviated. Low-elevation radar data can provide very useful information for accurately estimating surface precipitation, but partial o...

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Abstract

The invention relates to a correction method and system for radar reflectivity factors of a dual polarization radar. The method comprises: when raindrop spectrum data of at least one of the pluralityof raindrop spectrometers disposed around the dual polarization radar is acquired, determining that there is precipitation at at least one raindrop spectrometer, and performing a scattering simulationinversion based on the raindrop spectrum data to obtain radar polarization parameters; fitting a relationship between AH-KDP and AH-ZH according to the radar polarization parameters to obtain parameters of a region where the dual polarization radar is located; and obtaining corrected radar reflectivity factors according to the parameters, observation values of the radar polarization parameters, and a preset algorithm. Therefore, the invention can realize attenuation correction and partial occlusion correction of the radar reflectivity factors based on different precipitation processes in different regions.

Description

technical field [0001] The invention relates to the technical field of atmospheric science, in particular to a radar reflectivity factor correction method and system for a dual-polarization radar. Background technique [0002] In order to ensure the accuracy of radar detection, it is necessary to accurately estimate the main error sources before quantitatively using radar data. When the electromagnetic wave propagates in the precipitation medium, the intensity of the electromagnetic wave decreases with the increase of the distance, that is, rain attenuation. The attenuation of the rain zone often seriously affects the radar reflectivity factor Z H meteorological interpretation. When the frequency is large, such as C-band and X-band, the attenuation problem is more prominent, and effective correction must be carried out. Even in 3GHz (S-band), there is a certain attenuation. [0003] In the study of attenuation correction method, due to the influence of raindrop spectrum, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4056G01S7/4082
Inventor 唐琪
Owner BEIJING INST OF RADIO MEASUREMENT
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