Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1109/LGRS.2014.2386275 |
Extracting Snow Cover in Mountain Areas Based on SAR and Optical Data | |
He, Guangjun; Xiao, Pengfeng; Feng, Xuezhi; Zhang, Xueliang; Wang, Zuo; Chen, Ni | |
通讯作者 | He, Guangjun |
来源期刊 | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS |
ISSN | 1545-598X |
EISSN | 1558-0571 |
出版年 | 2015 |
卷号 | 12期号:5页码:1136-1140 |
英文摘要 | Snow cover in cold and arid regions is a key factor controlling regional energy balances, hydrological cycle, and water utilization. Interferometric synthetic aperture radar (InSAR) technology offers the ability to monitor snow cover in all weather. In this letter, a support vector machine (SVM) method for extracting snow cover based on SAR and optical data in rugged mountain terrain is introduced. In this method, RadarSat-2 InSAR interferometric coherence images are analyzed, adopting snow-covered and snow-free areas obtained from GF-1 satellite observations as the "ground truth." The analysis results indicate that the coherence in copolarizations is clearly correlated with the underlying surface type and local incidence angle. These two factors, combined with training samples from GF-1 wide field viewer data, were used to build an SVM to classify coherence images in HH polarization. The classification results demonstrate that snow cover extraction using this method can achieve mean accuracies of 83.8% and 77.5% in areas with low and high vegetation coverage, respectively. These accuracies are significantly higher than those achieved by the typical thresholding algorithm (72.7% and 69.2%, respectively). |
英文关键词 | Interferometric coherence mountain areas multisensor snow cover extraction |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000351412200044 |
WOS关键词 | SATELLITE DATA ; CLASSIFICATION ; RADAR ; PARAMETERS ; MICROWAVE ; IMAGE |
WOS类目 | Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology |
WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
来源机构 | 南京大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/187789 |
作者单位 | Nanjing Univ, Dept Geog Informat Sci, Nanjing 210046, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | He, Guangjun,Xiao, Pengfeng,Feng, Xuezhi,et al. Extracting Snow Cover in Mountain Areas Based on SAR and Optical Data[J]. 南京大学,2015,12(5):1136-1140. |
APA | He, Guangjun,Xiao, Pengfeng,Feng, Xuezhi,Zhang, Xueliang,Wang, Zuo,&Chen, Ni.(2015).Extracting Snow Cover in Mountain Areas Based on SAR and Optical Data.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,12(5),1136-1140. |
MLA | He, Guangjun,et al."Extracting Snow Cover in Mountain Areas Based on SAR and Optical Data".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 12.5(2015):1136-1140. |
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