红外与毫米波学报2017，Vol.36Issue(1)：120-126,7.DOI:10.11972/j.issn.1001-9014.2017.01.021
基于Sentinel-1的绿洲区域尺度土壤水分微波建模
Microwave modeling of soil moisture in Oasis regional scale based on Sentinel-1 radar images
摘要
Abstract
According to the latest Sentinel-1 radar system parameters and the surface characteristic parameters of the study area,this paper established a database of surface microwave scattering characteristics under the sparse vegetation cover condition by AIEM model.On the basis of AIEM model numerical simulation analysis,soil moisture inversion model was constructed.The results showed that:1) Under the different incident angles and polarization mode,the backscatter coefficient response of soil moisture (Mv) and the composite surface roughness (Zs) have obvious logarithmic correlation,respectively.Soil moisture response of VV polarization is sensitive,the optimal response range is for Mv 0 ～ 30％,Zs 0 ～0.06 cm.2) GammaMAP filtering has good denoising effect in the sentinel-1 radar data preprocessing.The spatial distribution of soil moisture extracted from sentinel-1 images has good consistency with the actual situation in the same period field in the study area.In April,the soil moisture spatio-temporal distribution of Weigan-Kuqa river basin shows spring drought characteristics.3) For 0 ～ 10 cm surface soil moisture,the correlation coefficient between the measured value and simulated value reaches 0.76,showing that this model is suitable for the extraction of soil moisture in the arid area of a certain regional scale.关键词
微波遥感/Sentinel-1/AIEM模型/土壤水分Key words
microwave remote sensing/sentinel-1/AIEM model/Soil moisture分类
信息技术与安全科学引用本文复制引用
王娇,丁建丽,陈文倩,杨爱霞..基于Sentinel-1的绿洲区域尺度土壤水分微波建模[J].红外与毫米波学报,2017,36(1):120-126,7.基金项目
新疆维吾尔自治区科技支疆项目(201591101) （201591101）
新疆维吾尔自治区重点实验室课题(2016D03001) （2016D03001）
国家自然科学基金项目(U1303381,41261090,41161063) （U1303381,41261090,41161063）
教育部长江学者和创新团队发展计划(IRT1180) （IRT1180）
新疆研究生科研创新项目(XJGRI2014022)Support Programs for Science and Technology of Xinjiang Province,China (201591101) （XJGRI2014022）
Program for Key Laboratory of Xinjiang Province,China (2016D03001) （2016D03001）
NSFC (U1303381,41261090,41161063) （U1303381,41261090,41161063）
Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (IRT1180) （IRT1180）
Research and Innovation Program for Postgraduate of Xinjiang Province,China (XJGRI2014022) （XJGRI2014022）
