Interferometry with ALOS-2 full-aperture ScanSAR data

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Cunren Liang , Eric Jameson Fielding 


Advanced Land Observing Satellite-2 (ALOS-2) is designed to routinely acquire both scanning synthetic aperture radar (ScanSAR) and stripmap data. In this paper, we present a special multiband bandpass filter (MBF) to remove azimuth nonoverlap spectra for the interferometric processing of ALOS-2 full-aperture ScanSAR product. As required by the MBF, we estimate the important ScanSAR system parameters and the start times of raw bursts using ALOS-2 full-aperture ScanSAR image. The resulting MBF can remove the nonoverlap spectra caused by both Doppler centroid frequency difference and burst misalignment. It can be used in ScanSAR-ScanSAR interferometry, as well as ScanSAR-stripmap interferometry. Based on the MBF, we propose a single processing workflow that is able to implement both ScanSAR-ScanSAR interferometry and ScanSAR-stripmap interferometry. Finally, we present example interferograms of the 2015 Gorkha earthquake in Nepal processed using the proposed processing workflow. The interferograms are greatly improved after applying the MBF to remove the significant amount of nonoverlap spectra in the data.



Aerospace Engineering, Civil and Environmental Engineering, Earth Sciences, Electrical and Computer Engineering, Engineering, Geology, Geophysics and Seismology, Glaciology, Mining Engineering, Other Engineering, Physical Sciences and Mathematics, Physics, Tectonics and Structure, Volcanology


remote sensing, Geology, Geophysics, volcanology, civil engineering, hydrology, InSAR, Sentinel-1, earthquake, Glaciology, Tectonics, geomorphology, , ALOS, ALOS-2, ALOS-4, deformation, geomatics, interferometry, L-band, NISAR, ScanSAR, Sentinel, Sentinel-1A, Sentinel-1B, synthetic aperture radar, SAR


Published: 2020-04-14 04:02

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GNU Lesser General Public License (LGPL) 2.1

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