Method for recognizing non-meteorological echo caused by automobile driving in radar echo

Abstract

The invention discloses a method for recognizing a non-meteorological echo caused by automobile driving in a radar echo. The method is characterized by comprising the following steps that the horizontal smoothness and the height of reflectivity of all effective echo points are calculated; radar body scan data within the set height range are equally divided into multiple vertical sampling data layers, and then the reflectivity average smoothness of each vertical sampling data layer is calculated; a discrete horizontal smoothness frequency distribution curve of a reflectivity range is obtained, and a horizontal dynamic threshold is found; the reflectivity vertical declining rate of each vertical effective echo point set is calculated; a discrete vertical declining rate frequency distribution curve of the reflectivity range is obtained, and a vertical dynamic threshold is found; all the effective echo points in the radar body scan data are recognized as the meteorological echo points and the non-meteorological echo points caused by automobile driving. The method for recognizing the non-meteorological echo caused by automobile driving in the radar echo has the advantage that the non-meteorological echo caused by automobile driving can be recognized rapidly and effectively.

Description

technical field [0001] The invention relates to a non-meteorological echo processing technology, in particular to a method for identifying non-meteorological echoes caused by automobile driving in radar echoes. Background technique [0002] Doppler weather radar uses the backscattering of electromagnetic waves by cloud and rain targets to discover meteorological targets, and measure the spatial position and intensity distribution of meteorological targets, so as to understand the occurrence, evolution, and movement speed of precipitation. But Doppler weather radar can also detect non-meteorological targets. When the non-meteorological target is processed into the radar base data, it will cause clutter pollution. The non-meteorological target is the non-meteorological echo, including ground clutter, isolated point and speckle noise clutter. Ground clutter includes ordinary ground clutter NP that exists when the radar beam propagates normally and transient clutter AP caused b...

AI Technical Summary

Problems solved by technology

Chinese Patent No. 200910153740.8 discloses a method for processing non-meteorological clutter in radar echoes. The radar reflectivity quality control algorithm involved in this invention has achieved good results in the first few years, but in the last 1 ~2 years, new types of non-meteorological echo interference caused by driving cars appeared on the radar

Therefore, the characteristics of the speed and broad width of this new type of clutter are still different from those of general super-refractive ground clutter. Poor recognition of echoes

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