光学与微波数据协同反演农田区土壤水分

被引:18
作者
马红章 [1 ]
张临晶 [2 ]
孙林 [2 ]
柳钦火 [3 ]
机构
[1] 中国石油大学(华东)理学院
[2] 山东科技大学测绘科学学院
[3] 中国科学院遥感与数字地球研究所遥感科学国家重点实验室
基金
中央高校基本科研业务费专项资金资助;
关键词
土壤水分; 被动微波遥感; MEX02实验; 协同反演;
D O I
暂无
中图分类号
S152.7 [土壤水分]; TP79 [遥感技术的应用];
学科分类号
摘要
光学和微波协同遥感反演对于提高农田土壤水分遥感反演精度十分重要。本文采用SMEX02数据集,研究了L波段土壤发射率与地表土壤水分之间的关系,分析了地面植被覆盖对L波段土壤发射率与地表水分之关系的影响规律,推导了以L波段土壤发射率和归一化植被指数NDVI为自变量的土壤水分反演模型。研究表明:L波段土壤发射率与地表土壤水分之间的相关性随NDVI的增加而下降。验证结果表明,本文算法相对常规经验算法,土壤水分反演精度明显提高,H极化条件下,土壤水分的反演精度RMSE由0.0553提高到0.0407,相关系数R2由0.70提高到0.81;V极化条件下,反演精度RMSE由0.0452提高到0.0348,相关系数R2由0.79提高到0.86。
引用
收藏
页码:673 / 685
页数:13
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