摘要
以新疆阿克苏地区红旗坡农场"冰糖心"苹果为研究对象,采用全极化Radarsat-2数据和实测果园的郁闭度,计算出植被实际雷达后向散射系数,并分别分析HH、VV和CROSS极化雷达后向散射系数和实际雷达后向散射系数与树高的相关关系,构建水云模型、指数和二次项模型反演苹果园的树高。反演结果表明:水云模型的最佳拟合模型为HH极化方式,R^2为0.116 8,实际雷达后向散射系数所建立的指数模型、二次项模型以VV极化的效果最好,R^2分别为0.811 3和0.795 4。
The apple species with rock candy heat of Hongqi Po farm in Xinjiang Aksu region was taken as the research object in this study. The actual radar backscatter coefficients of the vegetation were calculated based on the Radarsat - 2 data of all polarizations and the canopy density of the orchard. The HH, VV, CROSS polarimetric radar backscatter coefficients and the correlation relation-ships between actual radar backscatter coefficient and tree height were analyzed. The water cloud model, index and quadratic term model were established to predict the tree height of apple orchard. The results showed that the best fitting model of water cloud was HH polarization mode, with R^2 of 0. 116 8. The exponential model established by actual radar backscatter coefficient and the quadratic model with VV polarization were of the best effect, with R^2 of 0. 811 3 and 0. 795 4, respectively.
出处
《森林工程》
2017年第2期45-49,55,共6页
Forest Engineering
基金
新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2013I16)
国防科工局高分辩率对地观测系统专项(95-Y40B02-9001-13/15-01-01)
中国博士后科学基金项目(2015M572668XB)
