A Radar Echo Quality Control Method Based on Climate Statistical Analysis
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Abstract:
Based on the 6year observation data of the Nanjiao Sband radar in Beijing, the statistical characteristics of radar echoes and their spatial distribution are analyzed. The methods for identifying and correcting the clutter echoes and beam blocking by the statistical results are studied. The results show: (1) The climate characteristics of radar echo intensity probability is a good factor in identifying clutter echoes, and it is also very useful in identifying the radar beam blocking area and degree. Clutter echoes of Beijing are mainly located near the radar center and the piedmont areas of the western Beijing and northwestern Beijing. The radar beam blocking areas are mainly concentrated in the southeast because of the tall buildings and the northwest because of the topography. (2) Using the average vertical profile method with a changeable area, the high elevation echoes can be used to correct lowelevation clutter echoes, which can effectively correct the clutter echoes, and retain the local scale characteristics of echoes. The echo fillin of the beam blocking area is also made by this method, which can keep the continuity between the upper and lowerlevel elevation echoes. (3) The supported method of identifying clutter echoes and beam blocking can reflect the real situation of the local radar, being independent of prior knowledge. Compared with traditional ways, this method is more simple, reusable, and suitable for local weather.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.