[1]余祥伟,薛东剑*,陈凤娇.植被及坡度对SAR干涉相干性的影响分析[J].山地学报,2020,(6):926-934.[doi:10.16089/j.cnki.1008-2786.000568]
 YU Xiangwei,XUE Dongjian*,CHEN Fengjiao.Analysis of Influence of Vegetation Coverage and Slope on SAR Interferometric Coherence[J].Mountain Research,2020,(6):926-934.[doi:10.16089/j.cnki.1008-2786.000568]
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植被及坡度对SAR干涉相干性的影响分析
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年第6期
页码:
926-934
栏目:
山地技术
出版日期:
2021-05-01

文章信息/Info

Title:
Analysis of Influence of Vegetation Coverage and Slope on SAR Interferometric Coherence
文章编号:
1008-2786-(2020)6-926-09
作者:
余祥伟12薛东剑1*陈凤娇1
1.成都理工大学 地球科学学院,成都 610059; 2.四川省冶金地质勘查院,成都 610051
Author(s):
YU Xiangwei12XUE Dongjian1* CHEN Fengjiao1
1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059,China; 2. Sichuan Institute of Metallurgical Geology and Exploration, Chengdu 610051, China
关键词:
InSAR 空间失相关 地表起伏 植被覆盖区 数值模拟 相关分析
分类号:
TP70
DOI:
10.16089/j.cnki.1008-2786.000568
文献标志码:
A
摘要:
相干性是雷达干涉测量的基础,直接影响数据处理的难度和地形提取的精度,其研究对完善InSAR相干性分解模型及改进形变解算方法具有重要意义。本文从分析地表目标对雷达波束的后向散射特征出发,以灰色关联分析及建模分析相结合,重点研究了植被及坡度两个关键去相干源对相干性的影响。以C波段的哨兵1A TOPS模式数据验证了两个因素对干涉测量的限制,在统计分析的基础上,利用灰色关联度探讨了植被、坡度对相干性损失的贡献比例及影响规律,利用采样点建立了植被、坡度与相干性的函数关系,模拟出了三者的经验关系模型并进行了验证。研究发现:(1)植被是高覆被山区SAR影像空间失相干的主导因素,相干性和植被覆盖度之间呈幂函数关系,相关系数为0.5812;(2)相干性随坡度增加平稳衰减,且两者为反比例函数关系,相关系数为0.8027;(3)模型预估两个特征差异区域的相干性与短时间基线影像间的实际相干性接近,平均绝对值误差均低于0.14。本文研究对理解干涉测量条件,完善InSAR相干性估计方法以及指导InSAR数据选取及参数配置具有一定的参考价值。

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期(Received date):2019-05-31; 改回日期(Accepted date): 2020-12-10
基金项目(Foundation item):四川省科技计划项目(2019YJ0505); 国家重点研发计划子课题(2018YFC0706003-1)。[The Science and Technology Plan Project of Sichuan(2019YJ0505); Sub-project of National Key R&D Program of China(2018YFC0706003-1)]
作者简介(Biography):余祥伟(1994-),男,四川巴中人,硕士研究生,主要研究方向:雷达干涉测量。[YU Xiangwei(1994- ), male,born in Bazhong, Sichuan province, M.Sc., candidate, research on synthetic aperture radar interferometry] E-mail: 601119707@qq.com
*通讯作者(Corresponding author):薛东剑(1977- ),男,博士,副教授,主要研究方向:雷达图像处理及干涉测量。[XUE Dongjian(1977- ), male, Ph.D., associate professor, specialized in radar image processing and interferometry] E-mail: xdj101@sina.com
更新日期/Last Update: 2020-11-30