Normalized back scattering radar cross section of tropical rain forest in rondonia, northern Brazil

被引：4

作者：

Hashimoto, Y ^{[1
]}

Tsuchiya, K ^{[1
]}

Iijima, T ^{[1
]}

机构：

[1] TEIKYO UNIV,SCH SCI & ENGN,UTSUNOMIYA,TOCHIGI 320,JAPAN

来源：

CALIBRATION AND INTERCALIBRATION OF SATELLITE SENSORS AND EARLY RESULTS OF RADARSAT | 1997年 / 19卷 / 09期

关键词：

D O I：

10.1016/S0273-1177(97)00256-1

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Taking an advantage of Synthetic Aperture Radar (SAR) on board Japanese Earth Resources Satellite-1 (JERS-1) in capability of observing land surfaces through clouds, an attempt is made to extract deforested areas of tropical rain forests in Rondonia, Brazil. During the study the features of the normalized back scattering radar cross section sigma degrees are clarified. It was found that dense forests are characterized with the high values while sparse forests, bushes, range lands are characterized with the low values of sigma degrees depending on the density and physical characteristics of scatterers. In average following values are found :primary forests -6 similar to -7 dB, secondary forests -7.5 similar to -8.5 dB, pastures -10 similar to -13 dB, rivers -15 similar to -17 dB. It was also found that there is a seasonal effect on the values of sigma degrees reflecting the variation of the surface condition during the rainy and dry seasons. (C) 1997 COSPAR. Published by Elsevier Science Ltd.

引用

页码：1425 / 1428

页数：4