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Intelligent identification and early warning method of squall line features in radar echo images

A technology of radar echo and intelligent recognition, which is applied in radio wave reflection/re-radiation, radio wave measurement system, climate sustainability, etc. It can solve problems such as complex algorithms and achieve the effect of improving accuracy and reliability

Active Publication Date: 2022-08-02
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.

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  • Intelligent identification and early warning method of squall line features in radar echo images
  • Intelligent identification and early warning method of squall line features in radar echo images
  • Intelligent identification and early warning method of squall line features in radar echo images

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Embodiment 1

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

[0050] Step 1: Define the elevation angle number of the radar volume scan in the radar base data file as α, the value range of α is [0, max_α], max_α represents the maximum elevation angle number of the radar volume scan; the initial value of α is 0, that is, α =0; define the high-pass filter threshold 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 base reflectivity data whose elevation angle number is α from the file, and denote it as R(α);

[0052] Step 3: Convert R(α) from polar coordinate form to plane rectangular coordinate form, denoted as RP(α, x, y); where α is the elevation angle n...

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Abstract

The invention provides an intelligent identification and early warning method for squall line features in radar echo images. The Doppler weather radar detection data is used as the main data source to analyze the spatial distribution and intensity of the basic reflectivity detected by the radar. A series of steps such as preprocessing, filtering, image feature extraction, central axis analysis of the target, and squall line morphology analysis are used to realize intelligent identification and early warning of radar squall line features. The application of the method of the invention can automate and objectify the previous work that required subjective analysis and interpretation of radar echo images by meteorological professionals, and improves the accuracy and timeliness of related services of squall line identification and strong convective weather warning.

Description

Technical field: [0001] The invention belongs to the field of earth science, and relates to a method for intelligent identification and early warning of a "squall line" phenomenon represented in radar echo images, in particular to an intelligent identification and early warning for squall line features in radar echo images method. Background technique: [0002] A "squall line" is an obvious band-like or arc-like image that appears on the radar echo image when the weather radar detects it. The echo intensity of this shape area is significantly higher than that of the surrounding area outside the area. A "squall line" in meteorology refers to a narrow band of strong convective weather formed when meteorological elements such as atmospheric pressure, temperature or wind suddenly change. In general, it is a cloud and rain belt composed of multiple thunderstorm cells or super cells arranged in approximately a straight line or arc. Its width is about tens to 100 kilometers, and i...

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Application Information

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Patent Type & Authority Patents(China)
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