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多尺度相关性分析的机载双极化InSAR轨道误差校正方法
引用本文:何永红,靳鹏伟,蒋陈纯. 多尺度相关性分析的机载双极化InSAR轨道误差校正方法[J]. 地球信息科学学报, 2021, 23(4): 670-679. DOI: 10.12082/dqxxkx.2021.200213
作者姓名:何永红  靳鹏伟  蒋陈纯
作者单位:湖南科技学院 土木与环境工程学院,永州 425199
基金项目:国家自然科学基金项目(41531068);国家自然科学基金项目(41671356);湖南省自然科学资金项目(2020JJ4031)
摘    要:在高分辨率机载干涉SAR成像处理过程中,由于载机飞行过程中偏离理想轨迹,需要高精度的惯导系统和GPS系统记录载机的运动轨迹并进行运动补偿.然而,由于目前传感器导航精度的限制,在完成运动补偿处理后仍然存在轨道误差,从而影响干涉相位的精度,本文提出了一种机载双极化InSAR轨道误差去除方法.该方法利用小波多尺度分析对不同极...

关 键 词:PolInSAR  运动补偿  重复轨道  轨道误差  机载InSAR  多尺度分析  数字高程模型  残余运动误差
收稿时间:2020-04-29

An Airborne Dual PolInSAR Orbit Error Removal Method based on Multi-Scale Correlation Analysis
HE Yonghong,JIN Pengwei,JIANG Chenchun. An Airborne Dual PolInSAR Orbit Error Removal Method based on Multi-Scale Correlation Analysis[J]. Geo-information Science, 2021, 23(4): 670-679. DOI: 10.12082/dqxxkx.2021.200213
Authors:HE Yonghong  JIN Pengwei  JIANG Chenchun
Affiliation:School of Civil and Environmental Engineering, Hunan University of Science and Engineering, Yongzhou 425199, China
Abstract:In the process of high-resolution airborne interference SAR imaging, due to the deviation from the ideal trajectory during the flight of the aircraft, it is necessary to compensate the motion trajectory of the inertial navigation system and the GPS system. However, due to limited accuracy of current sensor navigation, orbit error still exists after motion compensation, which affects the accuracy of the interference phase. In this paper, a method of removing orbit error for airborne polarimetric interferometric SAR is proposed. This method uses wavelet multi-scale analysis to decompose the phase of differential interference in different polarization modes and reduce the interference of terrain error phase and noise phase to orbit error. According to the correlation of orbit error between different polarizations, the phase is corrected by weight reduction. Finally, we get Phase unwrapping of differential interference after orbit error correction. In order to verify the reliability of the method, simulated data and E-SAR P-band multi-polarization data are used for experimental analysis. The results show that the orbit errors are eliminated obviously. In addition, the correction interferograms obtained in P-band are also used to generate Digital Elevation Model (DEM). The Root Mean Square Error (RMSE) of DEM and LiDAR obtained before and after correction are 6.02 m and 1.68 m, respectively, which improves the accuracy of InSAR measurement. This study provides a new thought for airborne InSAR orbit error compensation.
Keywords:Polarimetric SAR Interferometry (PoLInSAR)  motion compensation  repeat pass  orbit error  Airborne InSAR  multiscale analysis  Digital Elevation Model (DEM)  Residual Motion Error (RME)  
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