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| 星载TomoSAR遗产探测仿真与形变监测 | |
| 其他题名 | Simulated Target Detection and Deformation Monitoring on Heritage with Spaceborne TomoSAR |
| 尤江彬 | |
| 出版年 | 2018 |
| 学位类型 | 硕士 |
| 导师 | 陈富龙 |
| 学位授予单位 | 中国科学院大学 |
| 中文摘要 | 和平与发展依然是当今世界的主旋律，在这样的时代背景下，文化遗产的价值得到了凸显与重视。首先，文化遗产具有重要的历史与文化价值，可以帮助人们认清历史发展，丰富文化内涵；其次，文化遗产具有一定的科学价值，可以借此论证文明之兴衰，环境之变迁；最后，文化遗产还具有相当的经济价值，能够有效促进博物馆业、旅游业的繁荣，带动经济发展。因此，文化遗产的探索发现和监测保护具有重大的时代意义，值得深入研究。多学科融合与跨领域应用是当今科学研究领域的发展趋势，本文将着力于星载合成孔径雷达层析（TomoSAR）技术在文化遗产的探测和保护方面的研究。遥感技术在文化考古方面具有宏观性、高效性、无损性等优势，而雷达遥感技术更是弥补了光学遥感穿透性不足的缺点。合成孔径雷达层析是一项前沿的、高水平的技术，可用于层析成像和监测地表形变，其在文化遗产考古方面的应用前景十分广阔。本文的研究内容主要分为两大部分：（一）星载TomoSAR技术在干旱沙漠地区掩埋遗迹探测的应用潜力研究。采用了计算模拟的方法，对模拟的多轨星载SAR信号进行层析处理，探究其发现次地表埋藏遗迹的能力。仿真实验中，环境条件进行了理想化假设，忽略大气相位、时间去相干等干扰因素，专注研究在合理的地表介质参数下，观测入射角、垂直总基线长、目标埋藏深度等因素对目标探测效果的影响。对实验结果进行分析对比，评估星载TomoSAR技术用于探测次地表掩埋遗迹的潜力。（二）D-TomoSAR技术在地表遗址形变监测中的应用实践研究。这部分采用了前沿的D-TomoSAR技术，对地表文化遗址的形变监测进行试验研究，采用MATLAB实现了其算法并封装成一个工具模块。基于26景南京地区TerraSAR-X/TanDEM-X数据，采用该研发工具包对南京明城墙仪凤门段以及朝天宫古建筑群进行了测试实验，揭示了该技术在遗址异常形变监测中的价值。 研究表明：1）在拥有小入射角、大空间基线、浅埋藏深度等理想条件时，星载TomoSAR技术在干旱沙漠地区次地表目标探测中具有一定的应用潜力。2）D-TomoSAR技术在地表遗址形变监测中具有很高的准确度，不仅能得到目标点在观测期间的平均稳定性，还能得到其形变时间序列，有很高的实用价值。 |
| 英文摘要 | The value of cultural heritage has been revealed by the era where peace and development play a dominate role on the stage. Firstly, cultural heritage has great value on history and culture because it helps us to know more about ancient people and events to enrich our cultural connotation. Secondly, it is valuable on science due to its benefit on research about the rise and fall of different civilizations and environment change. Thirdly, it plays an important role to promote economic development and prosperity, especially on tourism and museum. Therefore, it is of great meaning for the cultural heritage to be discovered, protected, and studied in depth.Multi-disciplinary integration and cross-domain application have become a trend at present times. To follow the tide, this thesis focuses on the technology of spaceborne synthetic aperture radar tomography (TomoSAR) in the applications of archaeological prospection and heritage motion monitoring. Remote sensing possesses an apparent advantage over archaeology because it is macroscopic, high-efficient and nondestructive. Furthermore, radar remote sensing can compensate the defect of optical remote sensing, in particular taking advantage of its penetration capability. Based on radar remote sensing, TomoSAR is a kind of cutting-edge, high-level technology, which can be used for tomographic imaging and motion monitoring, thus deserves our expectation on cultural heritage studies.The research of this thesis consists of two main parts:I. Research on the potentiality of spaceborne TomoSAR being applied to explore subsurface ruins in the dry desert. Simulation of subsurface tomographic imaging is applied by generating multi-track SAR images covering an ideal environment where interference factors like atmospheric phase screen and time de-correlation can be ignored. To evaluate the ability of spaceborne TomoSAR on subsurface target detection, important parameters, including incidence angle, vertical synthetic aperture and depth of buried target, are studied using control variant method.II. Research on the practical application of D-TomoSAR technology for deformation monitoring of ancient monuments. In this part, a cutting-edge technology, D-TomoSAR, is realized by MATLAB programming to derive a specific InSAR tool. Using 26 scenes of TerraSAR-X/TanDEM-X images over Nanjing City, the developed tool is applied to monitor the deformation of Yifeng Gate of Ming Dynasty City Walls and the ancient architectural complex of Chaotian Palace in Nanjing City, implying the potential of D-TomoSAR technology in the risk monitoring of cultural heritage sites.This study shows that: First, there is a worthy-to-be-confirmed potentiality of spaceborne TomoSAR to detect subsurface ruins in the dry desert when ideal conditions like small incidence angle, long vertical synthetic aperture and shallow depth of buried target can be guaranteed. Second, it is of great value for D-TomoSAR to monitor the deformation of ancient constructions due to its high precision to indicate anomalies with quantitative motion indicators, such as time series displacements. |
| 中文关键词 | 星载TomoSAR ; 文化遗产 ; 次地表目标探测 ; 形变监测 |
| 英文关键词 | Spaceborne TomoSAR Culture Heritage Subsurface Target Detection Deformation Monitoring |
| 语种 | 中文 |
| 国家 | 中国 |
| 来源学科分类 | 测绘工程 |
| 来源机构 | 中国科学院遥感与数字地球研究所 |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/288204 |
| 推荐引用方式 GB/T 7714 | 尤江彬. 星载TomoSAR遗产探测仿真与形变监测[D]. 中国科学院大学,2018. |
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