土壤含水量对PolInSAR树高反演结果的影响分析  

Effect of soil moisture content on tree height inversion by polinsar

作　　者：刘凯[1] 惠伟 程甲州 

机构地区：[1]西安市勘察测绘院,陕西西安710048 [2]陕西建工机械施工集团有限公司,陕西西安710048

出　　处：《科学技术创新》2020年第36期86-88,共3页Scientific and Technological Innovation

摘　　要：森林树高的反演是极化干涉合成孔径雷达(polarimetric SAR interferometry,PolInSAR)领域研究的热点,但时间去相关的存在引起了散射体的变化,降低了树高反演的性能,其中土壤含水量的改变是引起时间去相关的因素之一。本文利用PolSARpro生成不同土壤含水量的极化SAR模拟数据,通过三阶段算法进行树高反演实验。结果表明:土壤含水量的变化会导致反演结果产生一定偏差,但此偏差相对较小,已远远小于算法本身造成的误差。Forest tree height retrieval is a hot topic in the field of polarimetric SAR interferometry(polinsar).However,the existence of time decorrelation causes the change of scatterers and reduces the performance of tree height retrieval.The change of soil moisture content is one of the factors causing time decorrelation.In this paper,polsarpro is used to generate polarimetric SAR simulation data of different soil moisture content,and tree height retrieval experiment is carried out through three-stage algorithm.The results show that the change of soil water content will lead to a certain deviation in the inversion results,but the deviation is relatively small,which is far less than the error caused by the algorithm itself.

关 键 词：极化干涉SAR 树高反演 时间去相关 土壤含水量 

分 类 号：P237[天文地球—摄影测量与遥感]