Effectiveness evaluation of DS-InSAR method fused PS points in surface deformation monitoring: a case study of Hongta District, Yuxi City, China
Effectiveness evaluation of DS-InSAR method fused PS points in surface deformation monitoring: a case study of Hongta District, Yuxi City, China
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DOI：
10.1080/19475705.2023.2176011
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发表时间：
2023-02
期刊：
影响因子：
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通讯作者：
Yongfa Li;Xiao-qing Zuo;Fang Yang;Jinwei Bu;Wenhao Wu;Xinyu Liu
中科院分区：
文献类型：
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作者：
Yongfa Li;Xiao-qing Zuo;Fang Yang;Jinwei Bu;Wenhao Wu;Xinyu Liu
摘要干涉合成孔径雷达技术为大尺度地表形变探测提供了强有力的工具。特别是新近发展起来的融合PS点的DS-InSAR方法在监测裸地和植被覆盖区方面具有明显优势，但目前缺乏对该方法的有效性评价。为此，本文以玉溪市红塔区为例。利用DS-InSAR方法融合PS点对2019年1月至2019年12月的29个场景sentinel-1A数据进行了处理和分析。研究结果表明：3种方法反演结果的位置和形变趋势高度一致，融合PS点的DS-干涉合成孔径雷达方法与PS-干涉合成孔径雷达和SBAS-干涉合成孔径雷达方法的相关性分别为0.9473和0.8583。但PS点的DS-InSAR方法得到的测量点空间密度分别是PS-InSAR方法和SBAS-InSAR方法的11倍和4倍。结果表明，由于PS点的密度较高，DS-InSAR方法在形变映射位移方面比PS-InSAR和SBAS-InSAR方法具有更大的优势。有利于详细分析变形的时空特征和变形机制。
Abstract InSAR technology provides a powerful tool for detecting large-scale surface deformation. In particular, the newly developed DS-InSAR method fused PS points has obvious advantages in monitoring bare land and vegetation covered areas, but at present, there is a lack of effectiveness evaluation of this method. Therefore, this paper takes Hongta District of Yuxi City as an example. The 29 scenes sentinel-1A data from January 2019 to December 2019 were processed and analyzed using the DS-InSAR method fused PS points. The research results show that the position and deformation trend of the inversion results of the three methods are highly consistent, the correlation between DS-InSAR method fused PS points and PS- InSAR and SBAS-InSAR methods is 0.9473 and 0.8583, respectively. But the spatial density of the measurement points (MPs) obtained by the DS-InSAR method of PS points is 11 times and 4 times that of the PS-InSAR method and SBAS-InSAR method respectively. It clearly shows that DS-InSAR method fused PS points has greater advantages than PS-InSAR and SBAS-InSAR methods in deformation mapping displacement, because the MPs density is higher. It is conducive to the detailed analysis of the spatio-temporal characteristics and deformation mechanism of deformation.