A method and device for identifying upwind areas based on weather radar
A weather radar and identification method technology, applied in measurement devices, climate sustainability, reflection/re-radiation of radio waves, etc., can solve the problems of low identification efficiency and many false identifications, reduce identification errors, increase The effect of convenient identification and monitoring of severe convective weather
Active Publication Date: 2020-11-20
南京信大气象科学技术研究院有限公司
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[0003] At present, the algorithms for the identification of upwind areas are mainly based on image recognition and computer vision. Through image boundary tracking, image expansion and corrosion algorithms, etc., the upwind area can be identified to a certain extent, but there are many misidentifications and low recognition efficiency. Combined with manual judgment to enter practical application
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[0049] The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0050] Such as Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a method for identifying upwind areas based on weather radar, including:
[0051] Obtain radar base data in polar coordinates from the weather radar, and perform quality control on the radar base data in polar coordinates. Radar base data contains basic reflectivity factor and velocity, data quality control includes non-meteorological echo removal, de-velocity ambiguity, median filter (suppress / reduce the influence of Doppler data fluctuation residual ground clutter), etc., data The quality co...
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The invention discloses a headwind area identification method and a device based on a weather radar. The method comprises the following steps: acquiring radar base data from the weather radar, carrying out quality control on the radar base data and then extracting a basic reflectivity factor and a speed; converting the basic reflectivity factor and the speed into a grid point reflectivity factor and a grid point speed; calculating the combined reflectivity of the radar based on the basic reflectivity factor; identifying a connected domain of a convection cell based on the combined reflectivity, performing binarization processing on the speed, judging whether a positive speed and a negative speed exist in the connected domain in the array or not based on the speed data after binarization processing, if so, calculating an area proportion occupied by the areas of the two speeds, and taking the area with a smaller occupied area as a headwind area; and eliminating a headwind area identification result passing through error identification of the radar origin. Compared with a traditional computer vision and manual headwind area identification method, the method has the advantages that headwind area identification errors are effectively reduced, the headwind area identification efficiency is improved, and convenience is brought to severe convection weather identification and monitoring.
Description
technical field [0001] The invention relates to the technical field of headwind area identification, in particular to a method and device for identifying an upwind area based on weather radar. Background technique [0002] Global warming is intensifying, and extreme weather such as strong convection occurs frequently, which brings great harm to people's production and life. The headwind area is a definition proposed by Chinese meteorologist Zhang Peiyuan and others. On the velocity map with low elevation angle PPI and no velocity ambiguity in the Doppler radar velocity image, any velocity area in the same direction appears in another direction. The velocity zone is the upwind zone, and the wind zone cannot cross the origin of the station. The appearance of the headwind area reflects the horizontal momentum exchange process caused by the updraft, which is closely related to the strong convective weather. When the headwind area exists, it is basically accompanied by severe we...
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IPC IPC(8): G01S13/95G01S7/41
CPCG01S7/411G01S7/414G01S7/415G01S13/95Y02A90/10
Inventor 黄书荣楚志刚刘婷孙波詹少伟周可苗春生薛丰昌张越
Owner 南京信大气象科学技术研究院有限公司