Mitigating Ionospheric Artifacts in Coseismic Interferogram Based on Offset Field Derived From ALOS-PALSAR Data
作者： Bochen Zhang , Xiaoli Ding , Wu Zhu , Chisheng Wang , Lei Zhang
DOI: 10.1109/JSTARS.2016.2533441
关键词:
摘要: Ionospheric total electron content (TEC) disturbances can seriously influence the signal of low-frequency spaceborne synthetic aperture radar (SAR) systems, e.g., Advanced Land Observation Satellite (ALOS)-phased array-type L-band (PALSAR). With regard to coseismic studies using interferometric (InSAR), it is vital mitigate ionospheric artifacts in contaminated interferogram. In this paper, we propose a new method for integral constant calculation, and then aim improve estimation phase screen (IPS). The proposed based on both azimuth range displacement field maps. At present, be generated by an offset-tracking procedure or multiple-aperture InSAR (MAI), but only estimated procedure. We applied ALOS-PALSAR data that were acquired before after 2008 Wenchuan earthquake 2010 Darfield test method. This case study further showed streaks clearly visible maps these two cases, one which was MAI algorithm other algorithm. results confirmed long-wavelength non-coseismic regions could corrected use line-of-sight (LOS) corrections Darfield, $-35.9$ 21.0 cm $-6.6$ 10.0 cm along LOS direction, respectively.
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