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.
出处
《国土资源遥感》
CSCD
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)。
关键词
RADARSAT
SAR
蓄积量预测
树高
胸径
后向散射系数
Radarsat SAR
Forest stock volume estimation
Tree height
Diameter at breast height
Backscatter coefficient
