ZDR on-line calibration method of dual-polarization weather radar and apparatus thereof

A weather radar and calibration method technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of manual control, radar antenna accurately pointing to the center of the sun, discontinuous observation data, etc., to ensure continuity, broad application prospects, improve The effect of data precision

Active Publication Date: 2015-12-09
南京信大气象科学技术研究院有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the calibration process, the weather echo cannot be observed, resulting in the discontinuity of the observed data
[0007] 2. The whole process should be controlled manually
[0008] 3. Calibration parameter setting is more complicated and needs to be completed by specially trained personnel
[0009] 4. The angle of the sun is constantly changing, and it is difficult to point the radar antenna to the center of the sun accurately, so it is required to repeat it many times

Method used

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  • ZDR on-line calibration method of dual-polarization weather radar and apparatus thereof
  • ZDR on-line calibration method of dual-polarization weather radar and apparatus thereof
  • ZDR on-line calibration method of dual-polarization weather radar and apparatus thereof

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with specific embodiments.

[0039] Device embodiment

[0040] Such as figure 2 As shown, the dual-polarization weather radar ZDR online calibration device of the present invention includes a network communication module, a main control board, a GPS module, a horizontal inclination module and a memory.

[0041] 1. The network communication module adopts OAHEW5500 Ethernet chip, based on TCP / IP protocol (communication protocol: radial data time frequency is high, data volume is large, receiving adopts UDP multicast protocol, high transmission rate, good real-time performance. Correction of deviation command data Small amount, using TCP protocol, good reliability), communicating with the signal processor of the dual polarization weather radar, receiving the radial data output by the signal processor in real time and sending it to the main control board; sending the correction deviation command genera...

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Abstract

The invention discloses a ZDR on-line calibration method of a dual-polarization weather radar and an apparatus thereof. The on-line calibration method comprises the following steps: (1), receiving radial data outputted by a signal processor of a dual-polarization weather radar; (2), identifying a solar echo signal in the radial data received by the step (1); and (3), carrying out quadric surface fitting on the solar echo signal identified by the step (2) and calculating a ZDR deviation to carry out ZDR calibration. With the method and apparatus, real-time on-line calibration is carried out effectively without manual intervention; completion is realized automatically; and normal observation of the radar does not need to be interrupted.

Description

technical field [0001] The invention relates to ZDR (differential reflectivity factor) calibration of a dual-polarization weather radar, in particular to an online calibration method and device. Background technique [0002] Dual-linear polarization weather radar (hereinafter referred to as: dual-polarization radar) simultaneously or alternately emits horizontally and vertically polarized electromagnetic waves to obtain observation information such as the size, shape, quantity, phase state (solid, liquid, mixed state) and spatial orientation of cloud and rain particles. These observation data are widely used in short-term nowcasting, severe weather warning, artificial weather modification, hydrological runoff prediction and other fields. [0003] Differential reflectivity factor (ZDR) is one of the main polarization quantities observed by dual-polarization radar. It is calculated from the difference in the echo power of the horizontal and vertical channels and is a small sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
Inventor 楚志刚胡汉峰吴迪陈魁
Owner 南京信大气象科学技术研究院有限公司
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