星载SAR在涡阳县冬小麦测产中的应用  

Estimating Winter Wheat Yield in Guoyang County based on Synthetic Sperture Radar

作　　者：范伟[1,2,3] 荀尚培[1,2,3] 杨元建[1,2,3] 何彬方[1,2,3] 张宏群[1,2,3] 吴必文[1,2,3] 高锷 孙喜波 陈磊[5] 

机构地区：[1]安徽省气象科学研究所遥感研究室,安徽合肥230031 [2]安徽省大气科学与卫星遥感重点实验室,安徽合肥230031 [3]农业气象灾害评估与风险转移联合实验室,安徽合肥230031 [4]国元农业保险股份有限公司发展研究部,安徽合肥230031 [5]安徽省农业科学院情报研究所,安徽合肥230031

出　　处：《遥感技术与应用》2013年第6期1101-1106,共6页Remote Sensing Technology and Application

基　　金：国家自然科学基金资助项目"气象探测环境代表性的高分辨率卫星遥感评估方法研究"(41205126);公益性行业(气象)科研专项资助项目"淮河流域主要农作物旱涝损失精细化评估技术"(GYHY201006027);农业部农业信息服务技术重点实验室2013年开放课题"基于星载合成孔径雷达的安徽省淮河流域冬小麦估产模型研究"(2013-AIST-02);安徽省农业科学院学科建设与宏观农业研究项目"基于RadarSat-2和HJ星的安徽省淮河流域冬小麦估产模型研究"(13A1424)

摘　　要：由于雷达遥感的全天候、全天时的优势,使之成为南方大范围农业信息动态监测的最佳遥感手段。应用星载合成孔径雷达(SAR)—RadarSat-2,选择安徽省涡阳县冬小麦产区进行测产研究。利用SAR的多极化特点(HH/HV/VH/VV),针对此卫星影像比较选择VV极化,并在试验田取样,获得试验田产量,从而建立产量和后向散射系数关系的线性测产模型,在提取冬小麦种植区基础上,应用此模型对冬小麦进行大面积产量测产。通过计算,得到了超过80%精度的测产模型和冬小麦较准确的测产结果。研究结果表明:在冬小麦收割前一周左右应用SAR进行测产,从而为农保提供服务,这种思路和方法是行之有效的。Radar remote sensing is the most appropriate for agriculture monitoring and crops yield estimating as its capability of all-weather and day/night imaging. Especially, cultivated areas are most often cloudy and rainy in South China. The synthetic aperture radar--RadarSat-2 was adopted for winter wheat yield estimating in Guoyang County of Anhui Province. Using multi-polarization（HH/HV/VH/VV）,the VV polarization was chosen accord- ing to this satellite image. And sampling in experiment lands, the linear yield estimating model was built based on yield and backscatter coefficient. Subsequent the yield estimating in the big areas winter wheat production was pro cessed after winter wheat planting regions were extracted. After computing,above 800/{0 precision yield estimating model and yield estimating results for winter wheat were obtained. Therefore, accurating yield estimating was at rained. Applying SAR to yield estimating for winter wheat harvesting before about a week,then providing service to agriculture insurance, it illustrates these idea and method are effective.

关 键 词：合成孔径雷达(SAR) RADARSAT-2 冬小麦 测产 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]