| 基于二维形变场的地基SAR精度验证与分析 |
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| 引用本文： | 周吕,郭际明,胡纪元,章迪,陈明,杨飞.基于二维形变场的地基SAR精度验证与分析[J].武汉大学学报(信息科学版),2019,44(2):289-295. |
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| 作者姓名： | 周吕 郭际明 胡纪元 章迪 陈明 杨飞 |
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| 作者单位： | 1.武汉大学测绘学院, 湖北 武汉, 430079 |
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| 基金项目： | 国家自然科学基金41474004国家自然科学基金41461089国家自然科学基金41604019 |
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| 摘 要： | 地基SAR(synthetic aperture radar)可实现高精度的小区域性连续形变监测。为研究其形变探测能力与精度,建立了一套精度验证平台和系统。在楼顶布设不同位置分布的角反射器,并采用步进平台控制角反射器模拟不同数值形变,形变角反射器与稳定点及楼顶表面构成小区域二维形变场,利用IBIS-L(image by interferometric system-landslides)系统完成形变监测与分析。实验结果表明,当角反射器发生毫米级形变时,地基干涉雷达IBIS-L系统形变探测平均精度为0.27 mm,而角反射器发生亚毫米级形变时,其形变探测平均精度为0.11 mm;该系统可以实现小区域性的亚毫米级形变探测,对于缓慢微小变化,其具有更好的形变探测能力与可靠性。
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| 关 键 词： | 地基SAR 干涉 角反射器 形变探测 精度验证 |
| 收稿时间： | 2018-06-15 |
Accuracy Verification and Analysis of Ground-based Synthetic Aperture Radar Based on Two-dimensional Deformation Field |
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| ZHOU Lu,GUO Jiming,HU Jiyuan,ZHANG Di,CHEN Ming,YANG Fei.Accuracy Verification and Analysis of Ground-based Synthetic Aperture Radar Based on Two-dimensional Deformation Field[J].Geomatics and Information Science of Wuhan University,2019,44(2):289-295. |
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| Authors: | ZHOU Lu GUO Jiming HU Jiyuan ZHANG Di CHEN Ming YANG Fei |
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| Affiliation: | 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China2.College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China3.Key Laboratory of Precise Engineering and Industry Surveying of NASG, Wuhan University, Wuhan 430079, China4.National Geomatics Center of China, Beijing 100830, China |
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| Abstract: | Ground-based interferometric radar can realize small regional-scale continuous deformation monitoring with high-accuracy. To investigate the deformation detection capability and accuracy, a set of accuracy verification platform and system are established in this paper. The corner reflectors are arranged at different positions on the roof and the stepping platforms are used to control the corner reflectors and simulate deformation in different values. The deformation corner reflectors, stable points and the surface of the roof constitute a small two-dimensional deformation field. We use the IBIS-L system to finish the deformation detection and analysis. The experimental results show that when the millimeter level deformation occurs in the corner reflectors, the average accuracy of deformation detection of the ground-based interferometric radar IBIS-L system is 0.27 mm, while the sub millimeter level deformation occurs the corner reflectors, its average accuracy is 0.11 mm. This system can realize the sub millimeter level deformation detection in small regional-scale. For the small and slow change, this system has better deformation detection ability and reliability. |
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| Keywords: | GBSAR interferometry corner reflector deformation detection accuracy verification |
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