基于毫米波云雷达的融化层亮带识别算法研究

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Abstract In order to study the detection capability of millimeter-wave (Ka-band) cloud radar to the bright band of the melting layer,based on the gradient variation characteristics of radial velocity and the threshold of reflectivity by vertical pointed millimeter-wave cloud radar,the height range of melting layer bright band is determined.The automatic extraction for the height of the top,bottom,maximum echo intensity and maximum radial velocity gradient for the bright band is realized.The results show that the bright band of melting layer in precipitation could be recognized effectively by using the gradient characteristics of radial velocity,and the algorithm is not easily affected by convective activity.Within the melting layer,the reflectivity factor is consistent with the abrupt change range of radial velocity in the vertical direction.By comparing with the zero layer height of the sounding data at the corresponding observation time,the inverted melting layer height is close to the actual situation.

Key words： millimeter-wave cloud radar bright band of melting layer sounding data gradient characteristics

Received: 24 July 2019

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	Articles by authors
	Hu Shuzhen
	Tao Fa
	Zhang Xuefen
	Wen Qiang

Cite this article:

Hu Shuzhen,Tao Fa,Zhang Xuefen等. Research on bright band recognition algorithm of melting layer based on millimeter-wave cloud radar[J]. Meteorological Hydrological and Marine Instrument, 2020, 37(3): 1-5.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2020/V37/I3/1

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