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Content Provider | IET Digital Library |
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Author | Hu, Cheng Zhang, Bin Dong, Xichao Li, Yuanhao Cui, Chang |
Abstract | Geosynchronous SAR tomography (GEO TomoSAR) techniques exploit multi-pass SAR acquisitions of the same scene, taken with slightly different view angles, and allow generating fully 3D images. Compared to low earth orbit (LEO) SAR case, GEO SAR has the advantages of shorter revisit time period and wider coverage, which can greatly shorten the data acquisition time, improve the coherence of collected data and effectively improve the 3D imaging accuracy. However, GEO SAR has curved trajectories and un-parallel repeated trajectories, which introduce the along-track component of the spatial baseline. The obtained GEO TomoSAR data based on the data acquisition method using in LEO TomoSAR have the significant rotation-induced decorrelation. Thus, the imaging performance in the elevation is severely degraded. In this paper, we first analyse the feasibility of GEO TomoSAR to achieve 3D imaging. In view of the special issues existing in GEO TomoSAR, we adopt an optimal minimal rotation-induced decorrelation data acquisition method to obtain repeated trajectories data, which can effectively improve the coherence between the collected data. Then, performance of imaging in elevation was analysed based on the spatial baseline distribution. Finally, the feasibility and validity of GEO TomoSAR techniques are validated through computer simulation. |
Starting Page | 6359 |
Ending Page | 6363 |
Page Count | 5 |
Volume Number | 2019 |
e-ISSN | 20513305 |
Issue Number | Issue 20, Oct (2019) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/20 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0383 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2019-05-30 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | 3D Imaging Accuracy Computer Vision And Image Processing Technique Data Acquisition Data And Information; Acquisition, Processing, Storage And Dissemination in Geophysics Fully 3D Image GEO TomoSAR Data GEO TomoSAR Technique Geophysical Image Processing Geophysical Technique And Equipment Geosynchronous SAR Tomography Technique Imaging Performance Instrumentation And Technique For Geophysical, Hydrospheric And Lower Atmosphere Research LEO TomoSAR Low Earth Orbit SAR Case Multipass Geosynchronous SAR Tomography Multipass SAR Acquisitions Optical, Image And Video Signal Processing Optimal Minimal Rotation-induced Decorrelation Data Acquisition Method Radar Equipment Radar Imaging Radar Interferometry Remote Sensing by Radar Synthetic Aperture Radar System And Application Tomography |
Content Type | Text |
Resource Type | Article |
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