风云三号土壤水分遥感产品降尺度方法对比分析  

A comparison study of FY-3B soil moisture downscaling methods

作　　者：宋承运[1] 王艳丽[1] SONG Chengyun;WANG Yanli(School of Space Information and Surveying Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学空间信息与测绘工程学院,安徽淮南232001

出　　处：《黑龙江工程学院学报》2021年第3期13-16,32,共5页Journal of Heilongjiang Institute of Technology

基　　金：安徽省高等学校自然科学研究项目(KJ2017A072)。

摘　　要：为进一步研究适用于风云三号(FY-3)土壤水分遥感产品的降尺度方法,分别将基于不规则三角形特征空间的Chauhan模型与Piles模型等土壤水分降尺度方法应用于低分辨率风云三号B星(FY-3B)土壤水分产品,得到高分辨率土壤水分,结合地面观测数据,对不同降尺度方法进行对比分析。结果表明,不同降尺度方法后土壤水分与FY-3B土壤水分空间分布一致,其中,Chauhan模型降尺度后土壤水分与地面观测值相关性最好,均方根误差RMSE低于0.08 cm 3·cm-1,FY-3B土壤水分产品本身的精度以及降尺度模型是影响降尺度结果的重要因素。In order to further study the downscaling methods suitable for FY-3 soil moisture remote sensing products,the downscaling methods based on“irregular triangle”feature space,such as Chauhan model and Piles model,are applied to low resolution FY-3B soil moisture products to obtain high-resolution soil moisture.Combined with the ground observation data,different downscaling methods are compared and analyzed.The result shows that the spatial distribution of soil moisture is consistent with FY-3B soil moisture after different downscaling methods.Among them,the correlation between soil moisture after downscaling by chauhan model is the best,and the root mean square error(RMSE)is less than 0.08 cm 3·cm-1.The accuracy of FY-3B soil moisture products and the downscaling model are important factors affecting the downscaling results.

关 键 词：风云三号 土壤水分 降尺度 不规则三角形特征空间 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]