Early radar warning method based on GIS

A radar and radar echo technology, applied in the application field of Doppler weather radar information, can solve the problems such as the lack of judgment and analysis of rainfall conditions and the lack of identification of non-rainfall clutter.

Active Publication Date: 2009-09-16
SICHUANG TECH CO LTD
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AI Technical Summary

Problems solved by technology

The system uses ESRI's shp, shx format file operation and mapping table technology to realize the combination of radar data and GIS geographic information; the radar echo data is directly quoted without any technical processing, such as non-rainfall clutter ( Mainly the ground object echo) did not identify, did not judge and analyze the rainfall status related to the echo intensity, etc.

Method used

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  • Early radar warning method based on GIS

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Embodiment Construction

[0015] The radar early warning method based on GIS of the present invention comprises the following steps:

[0016] (1) Analyze the original picture of the radar echo to obtain the radar echo information;

[0017] (2) Calculate the maximum radar echo value of each township within the coverage area of ​​the radar map at the specified time;

[0018] (3) Identify whether the radar echo is a rain echo or a ground object echo, and exclude the ground object echo;

[0019] (4) Quantitatively estimate the rainfall in a certain time range in the future according to the maximum radar echo value;

[0020] (5) The method of vector superposition is adopted on the radar mosaic. For the area where the range overlaps, the larger echo value is used as the echo at that place.

[0021] The implementation method of step (1) is: establish a radar echo and color correspondence table; traverse the pixels of the original image of the radar echo line by line, and use the color information of the pix...

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Abstract

The invention relates to a Doppler radar information application domain, especially an early radar warning method based GIS, comprising the following steps: (1) obtaining radar echo information by analyzing radar echo original picture; (2) calculating the maximum radar echo value of each countryside town in radar map coverage area at appointed time; (3) distinguishing the radar echo being rainfall echo or ground echo to eliminate the ground echo; (4) estimating the rainfall in a certain time range in the future based on the maximum radar echo value; (5) using the bigger echo value as the echo in the area overlapping zones in way of vector superposing on the radar picture mosaic. The method is in favor of distinguishing the ground echo and estimating the rainfall on GIS platform.

Description

technical field [0001] The invention relates to the application field of Doppler weather radar information, in particular to a radar early warning method based on GIS. Background technique [0002] "Radar Echo Intensity Map" is the most widely used of many weather radar products. It is a polar coordinate image formed after radar scanning with the radar station as the origin and a detection radius of more than 200 kilometers. At present, the traditional radar echo images publicly provided by the meteorological department for use by all walks of life, although some are superimposed with administrative divisions, and some are spliced ​​into "radar puzzles", it is difficult to read and process information in the usual sense For processing operations, the rich digital information contained in radar echo images is difficult to be supported by computer application systems. [0003] The research and application of existing weather radar technology in China is basically limited to t...

Claims

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Application Information

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IPC IPC(8): G01S13/95
CPCY02A90/10
Inventor 汤成锋
Owner SICHUANG TECH CO LTD
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