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Intelligent identification and early warning method for squall line features in radar echo image

A radar echo, intelligent identification technology, applied in the reflection/re-radiation of radio waves, radio wave measurement systems, climate sustainability, etc., and can solve problems such as complex algorithms

Active Publication Date: 2020-04-10
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, for computer programs, how to accurately identify the squall line features in radar echo images and avoid missed and misjudgment as much as possible is a complex algorithmic problem.

Method used

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  • Intelligent identification and early warning method for squall line features in radar echo image
  • Intelligent identification and early warning method for squall line features in radar echo image
  • Intelligent identification and early warning method for squall line features in radar echo image

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Embodiment 1

[0049] This embodiment adopts a method for intelligent identification and early warning of squall line features in radar echo images proposed by the present invention, including the following specific steps:

[0050] Step 1: Define the elevation angle number of the radar body scan in the radar base data file as α, the value range of α is [0, max_α], and max_α indicates the maximum elevation angle number of the radar body scan; the initial value of α is 0, that is, α =0; the high-pass filter threshold is defined as Filt_A, the value range of Filt_A is a positive integer from 0 to 100, and the initial value of Filt_A is any positive integer between [60,100];

[0051] Step 2: Read the radar base data file to be analyzed, and extract the basic reflectivity data whose elevation angle number is α from the file, which is denoted as R(α);

[0052] Step 3: Convert R(α) from polar coordinates to planar rectangular coordinates, denoted as RP(α, x, y); where α is the number of the elevati...

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Abstract

The invention provides an intelligent identification and early warning method for squall line features in a radar echo image. Doppler weather radar detection data is used as a main data source, spatial distribution and intensity of basic reflectivity detected by a radar are analyzed, and intelligent identification and early warning of squall line features of the radar are realized through a seriesof steps of numerical preprocessing, filtering, image feature extraction, central axis analysis of a target object, squall line morphological analysis and the like. By applying the method, the work of subjectively analyzing and interpreting radar echo images by meteorological professionals in the past can be automated and objectified, and then the accuracy and timeliness of squall line identification and severe convection weather alarm related services are improved.

Description

Technical field: [0001] The invention belongs to the field of earth sciences, and relates to a method for intelligent identification and early warning of the "squall line" phenomenon represented in radar echo images, in particular to an intelligent identification and early warning of squall line characteristics in radar echo images method. Background technique: [0002] "Squall line" is an obvious belt-shaped or arc-like image that appears on the radar echo image when the weather radar is detecting. The echo intensity of this shape area is obviously higher than that of the surrounding area outside this area. The "squall line" in meteorology refers to the narrow strong convective weather belt formed when meteorological elements such as atmospheric pressure, temperature or wind suddenly change. Under normal circumstances, it is a cloud and rain belt composed of multiple thunderstorm cells or supercells arranged in a line or arc, with a width of about tens to one hundred kilom...

Claims

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Application Information

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IPC IPC(8): G01S13/95G01S7/41
CPCG01S13/958G01S7/411G01S7/418Y02A90/10
Inventor 卞浩瑄王兴陆冰鉴王丽娟苗春生陈苏婷朱文镇张海阳
Owner NANJING UNIV OF INFORMATION SCI & TECH
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