DEPOLARIZATION OF RADAR SIGNALS DUE TO MULTIPLE-SCATTERING IN RAIN

被引：25

作者：

ITO, S

OGUCHI, T

IGUCHI, T

KUMAGAI, H

MENEGHINI, R

机构：

[1] TOKYO METROPOLITAN INST TECHNOL,HINO,TOKYO 191,JAPAN

[2] COMMUN RES LABS,KOGANEI,TOKYO 184,JAPAN

[3] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1995年 / 33卷 / 04期

关键词：

D O I：

10.1109/36.406691

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：

The linear depolarization ratio (LDR) of radar returns from rain is studied, Pulse intensities of copolarized and cross-polarized components are calculated by using the second-order solution of the time-dependent radiative transfer equation for a finite rain layer composed of spherical raindrops, Theoretical results show significant differences in LDR values between X and Ka bands for light to moderate rainfall rates and a rapid increase in the LDR reaching a level of about - 8.5 dB at radar ranges near the rear edge of the rain layer. These characteristics of the LDR are in good agreement with observations from an air-borne dual-frequency, dual-polarized radar and suggest that a part of the depolarized radar power is caused by second-order multiple scattering effects.

引用

页码：1057 / 1062

页数：6

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