地基干涉合成孔径雷达图像非线性大气相位补偿方法

胡程; 邓云开; 田卫明; 曾涛

doi:10.12000/JR19073

地基干涉合成孔径雷达图像非线性大气相位补偿方法

DOI: 10.12000/JR19073

胡程^1, ,,
邓云开^1, ,,
田卫明²,
曾涛²

1.
北京理工大学信息与电子学院雷达技术研究所北京 100081
2.
北京理工大学卫星导航电子信息技术教育部重点实验室北京 100081

基金项目: 国家自然科学基金(61427802, 61601031)

详细信息

作者简介:
胡　程(1981–) 男，湖南岳阳人，博士，北京理工大学，研究员。主要研究方向为新体制合成孔径雷达系统与信号处理、生物探测雷达系统与信息处理技术等；在IEEE Trans. on GRS, IEEE Trans. on AES, J-GR, Remote Sensing等国内外期刊发表SCI论文60余篇，国内外会议发表EI论文100余篇；授权发明专利30余项。E-mail: cchchb@163.com

邓云开(1992–) 男，河南周口人，博士，北京理工大学。主要研究为地基SAR高精度1维形变与3维形变实时测量算法，目前已发表SCI论文5篇，其他论文7篇。E-mail: yunkai_bit@foxmail.com

通讯作者:
胡程 cchchb@163.com

邓云开 yunkai_bit@foxmail.com

中图分类号: TN95
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- 被引次数: 24
出版历程
- 收稿日期: 2019-08-12
- 修回日期: 2019-11-08
- 网络出版日期: 2019-12-01

A Compensation Method of Nonlinear Atmospheric Phase Applied for GB-InSAR Images

HU Cheng^{1
, ,},
DENG Yunkai^{1
, ,},
TIAN Weiming²,
ZENG Tao²

1.
Radar Research Lab, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
2.
Key Laboratory of Electronics and Information Technology in Satellite Navigation, Beijing Institute of Technology, Ministry of Education, Beijing 100081, China

Funds: The National Natural Science Foundation of China (61427802, 61601031)

More Information

Corresponding author: HU Cheng, cchchb@163.com; DENG Yunkai, yunkai_bit@foxmail.com

摘要

摘要:
采用基于永久散射体(PS)技术的大气相位(AP)补偿方法对地基干涉合成孔径雷达(GB-InSAR) 干涉相位图进行分析时，部分图像的干涉相位随距离呈现出复杂的非线性，导致无法建立合理的多参数模型来模拟大气相位，常规的补偿方法不再适用。该文提出一种改进的GB-InSAR图像非线性大气相位补偿方法，首先采用常规方法对干涉相位图进行大气相位补偿，并根据PS点的补偿后相位序列的标准差，进行稳定PS点的选择，然后对稳定PS点进行子区域划分，通过反距离加权插值估计出所有PS点的大气相位，从而实现大气相位的有效补偿。采用该文所提方法，对460幅雷达图像进行了处理，相比于常规方法，可以有效地补偿干涉相位图中的非线性大气相位分量。基于若干高稳定参考点的对比结果表明，该方法减小了最大约1 rad的相位测量误差。
- 地基干涉合成孔径雷达 /
- 大气相位补偿 /
- 非线性变化 /
- 稳定永久散射体 /
- 反距离加权插值
Abstract:
When the Permanent Scatterer (PS) technique is utilized to compensate the Atmospheric Phase (AP) for Ground-Based Interferometric Synthetic Aperture Radar (GB-InSAR) images, a proper parametric model should be built to describe the AP. However, for some interferograms, the AP may nonlinearly vary with the PS range, and this cannot be effectively compensated via the conventional method. This paper proposes an improved method to compensate the nonlinear AP. Here, the conventional method is first used to compensate all the phase interferograms. By calculating the standard deviation of the phase sequence of every PS and setting a proper threshold, a large number of stable PSs are selected. Then these stable PSs are divided into a certain number of sub-regions, and some control points are determined. With the inverse distance weighting interpolation, the APs of all the PSs are estimated and compensated. To verify the effectiveness of the proposed method, 460 radar images are processed, and the results are made compared with those of the conventional method. The nonlinear AP could be better compensated with the proposed method to avoid misunderstanding of the motional area. Several reference PSs are selected to make quantitative comparisons, and measurement error up to 1 rad could be reduced.

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图 1 场景信息

Figure 1. Scene information

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图 2 MIMO雷达系统照片

Figure 2. Photo of the MIMO radar system

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图 3 MIMO雷达图像与PS图

Figure 3. MIMO radar image and PS map

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图 4 长时间基线干涉相位图

Figure 4. Interferometric phase map with long temporal baseline

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图 5 短时间基线干涉相位图A和B

Figure 5. Interferometric phase maps of A and B with short temporal baselines

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图 6 形变PS点选择

Figure 6. Selection of deformation PS

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图 7 非线性大气相位补偿

Figure 7. Non-linear atmospheric phase compensation

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图 8 参考点相位曲线对比

Figure 8. Phase comparison curves of reference points

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图 9 累积相位图

Figure 9. Cumulative phase maps

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施引文献

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2.	白泽朝，王彦平，王振海，胡俊，李洋，林赟. 地基大视场SAR形变监测的非均匀大气相位校正方法. 雷达学报. 2023(01): 53-63 . 本站查看
3.	徐甫，王政，李振洪，李永生. 复杂环境下的地基雷达大气改正方法. 武汉大学学报(信息科学版). 2023(12): 2069-2081 . 百度学术
4.	杜年春，王玉明，沈向前，谢翔. 滑坡灾害监测的圆弧合成孔径雷达大气相位校正方法. 测绘学报. 2022(10): 2139-2148 . 百度学术
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7.	朱嘉鑫，邓云开，田卫明，胡程. 基于K-means算法的时序GB-InSAR图像PS实时选择方法. 信号处理. 2021(03): 349-357 . 百度学术
8.	朱嘉鑫，李永建，肖刚，余东洋，付振华，张志家，朱晨浩，戴颖超. 基于SAR图像配准的地基干涉雷达间断测量技术. 露天采矿技术. 2021(05): 46-50 . 百度学术
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