Method and device for processing echo images of weather radar

Abstract

The present invention discloses a weather radar echo image processing method. The method comprises the steps of carrying out the storm tracking detection on a weather radar echo image, and determining the storm clusters contained in the weather radar echo image; determining the initial area of each storm cluster; determining and deleting the echo data points of which the echo intensity is less than a first intensity threshold value in the storm clusters, wherein the first intensity threshold value is less than a conventional rainfall echo intensity lower bound; carrying out the continuity detection on the current echo data points contained by the storm clusters, and determining and deleting the clutter data points in the storm clusters; calculating the ratios of the current areas and the initial areas of the storm clusters respectively, and deleting the storm clusters of which the ratios are less than a second threshold value. Based on the method disclosed by the present invention, the clutter of higher intensity can be filtered effectively, and the rainfall echo of lower intensity can be retained, thereby being able to reduce the possible deviation during a subsequent weather prediction process. The present invention also discloses a weather radar echo image processing device.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201510784183.5 and the invention title "processing method and processing device for weather radar echo image" submitted to the China Patent Office on November 16, 2015, the entire contents of which are incorporated by reference in this application. technical field [0002] The invention belongs to the technical field of meteorological prediction, and in particular relates to a processing method and a processing device for weather radar echo images. Background technique [0003] In the field of meteorological forecasting, it is important to predict the precipitation in the future. At present, the echo images of weather radar are usually used to predict the amount of precipitation. For example: using Doppler radar echo images, according to the appropriate Z-R relationship (reflectivity factor and rain intensity relationship) to determine the future precipitation in an are...

AI Technical Summary

Problems solved by technology

[0004] The current Doppler weather radar is limited by its principle and has some defects: when the elevation angle of the Doppler weather radar is small, it is easily affected by ground debris (such as birds) and buildings, resulting in a large number of non-precipitation echoes

[0005] However, the existing processing methods for weather radar echo images still have defects: high-intensity clutter cannot be filtered out, and precipitation echoes with low intensity will be filtered out, resulting in deviations in subsequent weather forecasts

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