Radarsat SAR的森林生物物理参数信号响应及其蓄积量估测  

A STUDY ON FOREST BIOPHYSICAL PARAMETER IMPACT ON RADAR SIGNATURE AND EXTRACTION OF FOREST STOCK VOLUME BY MEANS OF RADARSAT-SAR

作　　者：王臣立[1] 牛铮[1] 郭治兴[2] 丛丕福[1] 邓小炼[1] 

机构地区：[1]中国科学院遥感应用研究所遥感科学国家重点实验室,北京100101 [2]广东省生态环境与土壤研究所,广州510650

出　　处：《国土资源遥感》2005年第2期24-28,共5页Remote Sensing for Land & Resources

基　　金：中国科学院知识创新工程重大项目(KZCX1-SW-01-02);国家重点基础研究发展规划项目(G2000077902)。

摘　　要：利用地面实测数据,系统探讨了RadarsatSAR数据在森林蓄积量估测方面的应用潜力和森林生物物理参数信号响应。结果表明:RadarsatSAR后向散射系数与森林蓄积量、树高及胸径之间的关系可以用对数模型模拟;树种对后向散射系数具有一定影响;利用后向散射系数估测森林蓄积量,其精度基本符合林场大面积总体估测的精度要求,但小班水平应用效果不理想。Based on the field survey data, this paper has analyzed the capability of Radarsat-SAR data on extracting the forest stock volume. The results obtained show that the Radarsat-SAR backscatter coefficient has a relatively good correlation with the forest stock volume, tree height and diameter at the breast height. Studies also show that the backscatter coefficient is much more affected by height than by diameter at the breast height. It is held that C band of SAR can be used to extract forest stem volume in a large plantation but is not suitable for forest survey.

关 键 词：RADARSAT SAR 蓄积量预测 树高 胸径 后向散射系数 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] S771.8[自动化与计算机技术—控制科学与工程]