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Method for correcting radar echo attenuation based on microwave link network

一种微波链路、雷达回波的技术，应用在无线电波的反射/再辐射、无线电波测量系统、利用再辐射等方向，能够解决雷达回波强度和探测面积减小、降水定量估计难、不能真实地反映出降雨分布状况等问题

Active Publication Date: 2017-01-11
PLA UNIV OF SCI & TECH
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Problems solved by technology

Attenuation causes the reduction of radar echo intensity and detection area, especially at long distances, the observed value of radar reflectivity factor is smaller than the actual value, which cannot truly reflect the rainfall distribution
This makes accurate quantitative estimates of precipitation using weather radars still a challenge

Method used

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  • Method for correcting radar echo attenuation based on microwave link network
  • Method for correcting radar echo attenuation based on microwave link network
  • Method for correcting radar echo attenuation based on microwave link network

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Embodiment Construction

[0040] Embodiments of the present invention will be described in detail in conjunction with the accompanying drawings.

[0041] The invention utilizes the attenuation value and the correction model of the microwave link to realize the attenuation correction of the radar echo intensity. Include the following steps:

[0042] 1. Build a microwave link network, such as the location of the radar figure 1 shown.

[0043] 2. Measure the rain-induced attenuation of the microwave link in a specific frequency band.

[0044] In the attenuation correction method based on microwave links, the path integral attenuation value can be obtained through the measurement of single-frequency, dual-frequency or multi-frequency links. The single-frequency link generally selects the same or similar frequency band as the radar band. Dual-frequency or multi-frequency microwave links generally select a frequency band that satisfies the attenuation characteristics, is highly correlated during rainfall...

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Abstract

The invention discloses a method for realizing correcting weather radar data echo intensity based on region attenuation of microwave link network. The microwave link network and weather radar detected data are in time and space matching by measuring the rain attenuation of microwave link network under the specific frequency band, discrete gridding treatment is carried out. The simultaneous iterative reconstruction inverse technology is taken as the example, the attenuation rate corresponding to each gridding in the discrete attenuation is obtained according to a series of attenuation values of microwave link network combining with the inverse technology. The total attenuation value of the path can be obtained by the distance between the radar and each gridding, and the region attenuation of radar echo intensity is realized to be corrected by radar echo attenuation and correction model.

Description

technical field [0001] The invention relates to a method for realizing weather radar attenuation correction based on regional attenuation of a microwave link network, which is mainly used in weather radar remote sensing rainfall. Background technique [0002] The attenuation of microwave by rainfall has a non-negligible effect on radar detection and signal communication. The higher the microwave frequency, the more serious the attenuation. The attenuation effect reduces the radar echo intensity and detection area, especially at long distances, the observed value of the radar reflectivity factor is smaller than the actual value, which cannot truly reflect the rainfall distribution. This makes accurate quantitative estimation of precipitation using weather radars still a difficult problem. In some weather radar applications, it is desirable to measure the attenuation along a selected propagation path and to correct the radar echo for attenuation. [0003] A new technique, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/95
CPCG01S7/41G01S13/95G01S7/40G01S13/951Y02A90/10
Inventor 高太长薛杨刘西川张鹏宋堃马研
Owner PLA UNIV OF SCI & TECH
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