...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Remote Sensing >Backscattering characteristics of L-band polarimetric and optical satellite imagery over planted acacia forests in Sumatra, Indonesia
【24h】

Backscattering characteristics of L-band polarimetric and optical satellite imagery over planted acacia forests in Sumatra, Indonesia

机译：印度尼西亚苏门答腊人工洋槐林L波段偏振和光学卫星图像的反向散射特性

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Backscattering characteristics of L-band synthetic aperture radar (SAR) polarization data over industrial plantation forests of the fast-growing Acacia mangium in Sumatra, Indonesia, were investigated by combined analysis of microwave and optical reflectance imagery acquired by the Advanced Land Observation Satellite (ALOS) and ground observation data of forest stand characteristics. Prior to the satellite data analysis, growth curves of the planted trees are analyzed using ground observation data. The results show that tree growth fits a sigmoidal curve with a maximum growth rate between 1 and 2 years of age, which gradually declines after that. Our statistical analyses using satellite and ground observation data provide the following findings: 1. The regression between SAR backscattering intensity and forest stand characteristics fits negative quadratic curves for the cross-polarization HV, which show higher correlation than those obtained for the co-polarizations (HH, VV); 2. A decreasing trend in optical normalized difference vegetation index (NDVI) values with age prevails for the trees 2 years and older; 3. A significant correlation is obtained between SAR backscattering and NDVI for the crosspolarization. These findings suggest that the L-band SAR cross-polarization is strongly affected by the acacia tree foliage.
机译：通过结合由高级陆地观测卫星（ALOS）获得的微波和光反射图像，研究了印度尼西亚苏门答腊快速生长的马占相思的工业人工林上的L波段合成孔径雷达（SAR）偏振数据的反向散射特性。 ）和林分特征的地面观测数据。在进行卫星数据分析之前，使用地面观测数据来分析植树的生长曲线。结果表明，树木生长符合S形曲线，最大生长速度在1-2岁之间，此后逐渐下降。我们使用卫星和地面观测数据进行的统计分析提供了以下发现：1. SAR反向散射强度与林分特征之间的回归拟合为交叉极化HV的负二次曲线，与二次极化HV相比，它们显示出更高的相关性（ HH，VV）; 2. 2岁及以上树木的光学归一化植被指数（NDVI）值随年龄的增长呈下降趋势; 3.对于交叉极化，SAR反向散射与NDVI之间存在显着相关性。这些发现表明，相思树的叶子对L波段SAR的交叉极化有很大的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号