Nowcasting method and system of thunder cloud cluster based on boundary recognition and tracer technique

A technology for boundary identification and nowcasting, which is applied in the fields of tracking and early warning, and thunderstorm cloud cluster identification. rate effect

Inactive Publication Date: 2011-01-05
METEOROLOGICAL BUREAU OF SHENZHEN MUNICIPALITY
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Problems solved by technology

The cross-correlation method divides the entire data area into several small areas, calculates the correlation coefficient between the radar echo images at adjacent times, and determines the area in the image at the adjacent time by the maximum correlation coefficient, thereby determining the average motion of the echo; this method is widely used in China It has been widely used, but its disadvantage is that it cannot accurately divide the physical boundaries of cloud clusters, and cannot obtain the characteristics of individual storms
The monomer centroid method first identifies the monomer, and calculates the center of mass posit

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  • Nowcasting method and system of thunder cloud cluster based on boundary recognition and tracer technique
  • Nowcasting method and system of thunder cloud cluster based on boundary recognition and tracer technique
  • Nowcasting method and system of thunder cloud cluster based on boundary recognition and tracer technique

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[0032] The method and system of the present invention will be further described in detail below in conjunction with the drawings and the embodiments shown in the drawings.

[0033] Such as figure 1 As shown, the thunderstorm cloud nowcasting system based on the boundary identification and tracking technology of the present invention includes a weather radar for detecting thunderstorm cloud and a radar data processing system. Observing thunderstorm clouds generally requires the use of two or more meteorological radars distributed in different places to combine to form a larger detection area. The radar data processing system includes:

[0034] The radar data preprocessing module is used to preprocess the radar reflection echo signal to form digital radar echo data in the form of a two-dimensional grid in the detection area, and perform binarization processing on the radar echo data to form thunderstorm clouds Binary image space required for boundary recognition;

[0035] The...

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Abstract

The invention discloses a nowcasting method and system of a thunder cloud cluster based on the boundary recognition and tracer technique. The method performs the cloud cluster boundary recognition and topology process to establish the relationship between cloud cluster life timing and clan pedigree by using the pattern recognition technique. The method comprises the steps of performing the boundary recognition on the pre-processed radar data; respectively recognizing the life timing of each cloud cluster and the information of moving direction, velocity, area and strong center and the like ofeach cloud cluster through the six judging factors of the quadtree matching analysis factor, the overlap factor, the area factor, the circum-rectangle factor, the outline comprehensive factor and thelocal similarity determination factor; and performing linear extrapolation on the moving direction, velocity, area and the strength of the cloud cluster. The preliminary result indicates that the system and the method of the invention can realize better recognition and extrapolation forecast of the thunder cloud cluster.

Description

technical field [0001] The invention relates to a short-term nowcasting and early warning method and system for a meteorological business department, in particular to a method and system for thunderstorm cloud identification, tracking and early warning technology based on high temporal and spatial resolution radar data. Background technique [0002] The identification, tracking and early warning technology of thunderstorm cloud based on high spatial and temporal resolution radar data is one of the most important nowcasting and early warning technologies for thunderstorm cloud. The main methods include cross-correlation (TREC) method and single centroid method. The cross-correlation method divides the entire data area into several small areas, calculates the correlation coefficient between the radar echo images at adjacent times, and determines the area in the image at the adjacent time by the maximum correlation coefficient, thereby determining the average motion of the echo;...

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Application Information

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IPC IPC(8): G01S7/41G01S13/95G01W1/10
CPCG01W1/10G01W2203/00Y02A90/10
Inventor 兰红平孙向明梁碧玲毛辉张文海
Owner METEOROLOGICAL BUREAU OF SHENZHEN MUNICIPALITY
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