Coherence bias mitigation through regularized tapered coherence matrix for phase linking in decorrelated environments
文献类型：期刊论文
| 作者 | Liang, Hongyu2; Zhang, Lei2; Li, Xin1; Wu, Jicang2 |
| 刊名 | ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 215页码:369-382 |
| 关键词 | Distributed scatterer SAR interferometry Phase linking Sample coherence matrix refinement Matrix regularization and tapering Decorrelated environments |
| ISSN号 | 0924-2716 |
| DOI | 10.1016/j.isprsjprs.2024.07.016 |
| 通讯作者 | Zhang, Lei(lslzhang@tongji.edu.cn) |
| 英文摘要 | Phase linking technique has shown the ability to mitigate the decorrelation effect on the time series interferometric synthetic aperture radar (InSAR) data. By imposing the temporal phase-closure constraint, this technique reconstructs a consistent phase series from the complex sample coherence matrix (SCM). However, the bias of coherence estimates degrades the performance of phase linking, especially in near-zero coherence environments with limited spatial sample support. In this study, we present a methodology to enhance phase linking, with an emphasis on SCM refinement. The incentive behind this is to shrink the tapered SCM towards a scaled identity matrix by exploiting the inner correlation and coherence loss trend in SCM. This allows debiasing the SCM magnitude even in the presence of small sample size. We demonstrate the performance of this method by simulations and real case studies using Sentinel-1 data over Hawaii island. Results from comprehensive comparisons validate the effectiveness of coherence matrix estimation and the enhancement to phase linking in different coherence scenarios. The source code and sample dataset are available at https://www.mathworks.com/matl abcentral/fileexchange/169553-insar-phase-linking-enhancement-by-scm-refinement. |
| WOS关键词 | DISTRIBUTED SCATTERERS ; SAR ; INTERFEROMETRY ; RESOLUTION ; SELECTION |
| 资助项目 | National Key Research and Development Project of China[2021YFC3000402] ; National Natural Science Foundation of China[42174005] ; National Natural Science Foundation of China[42204023] ; Fundamental Research Funds for the Central Universities[22120240063] |
| WOS研究方向 | Physical Geography ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:001284426400001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Project of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/207207]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Lei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Tongji Univ, Coll Surveying & Geoinformat, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liang, Hongyu,Zhang, Lei,Li, Xin,et al. Coherence bias mitigation through regularized tapered coherence matrix for phase linking in decorrelated environments[J]. ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,2024,215:369-382. |
| APA | Liang, Hongyu,Zhang, Lei,Li, Xin,&Wu, Jicang.(2024).Coherence bias mitigation through regularized tapered coherence matrix for phase linking in decorrelated environments.ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING,215,369-382. |
| MLA | Liang, Hongyu,et al."Coherence bias mitigation through regularized tapered coherence matrix for phase linking in decorrelated environments".ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING 215(2024):369-382. |
入库方式： OAI收割
来源：地理科学与资源研究所
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