Effects of melting layer on Ku-band signal depolarization

被引:14
|
作者
Sarkar, Thumree [1 ]
Das, Saurabh [1 ]
Maitra, Animesh [1 ]
机构
[1] Univ Calcutta, Inst Radio Phys & Elect, Kolkata 700009, India
关键词
Depolarization; Ku-band; Melting layer; Rain attenuation; MICRO RAIN RADAR; PROPAGATION MEASUREMENTS; SATELLITE; PRECIPITATION; TROPICS; 12-GHZ;
D O I
10.1016/j.jastp.2014.06.006
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Propagation effects on Ku-band over an earth-space path is carried out at Kolkata, India, a tropical location, by receiving a Ku-band signal with horizontal plane polarization transmitted from the geostationary satellite NSS-6 (at 95 degrees E). The amplitude of co-polar attenuation has been monitored along with the measurements of rain rate, rain drop size distribution and height profile of rain rate. The cross-polar enhancement of the signal is also monitored by receiving the same signal in orthogonal direction with another identical receiver. The experimental observations are used to study the effect of melting layer on both co-polar attenuation and cross-polar enhancement for the rain events observed during 2012-2013. Melting layer is indicated by the bright band signature in vertical profile of rain rate. The ground based drop size measurements indicate that the stratiform rain has more number of small drops whereas convective rain composed of large rain drops. The results indicate that the depolarization due to melting layer is more dominant compared to that due to the drop deformation mechanism at low rain rates. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:95 / 100
页数:6
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