3:00 PM - 4:00 PM
[J09-P-01] InSAR analysis all over Japan by ALOS-2 (Daichi-2) / PALSAR-2 data
SAR interferometry (InSAR) is a powerful and unique remote sensing technique for detecting and monitoring ground surface deformation with high spatial resolution without any ground based observation infrastructures.
The Geospatial Information Authority of Japan (GSI) has conducted to monitor ground surface deformation of earthquakes, volcanic activities, subsidence and landslides throughout Japan by InSAR analysis using ALOS-2 data. With images obtained from InSAR analysis (hereinafter referred to as “SAR interferograms"), we have detected a lot of ground surface deformations caused by earthquakes and volcanic activities, subsidence derived from overuse of ground water, seasonal uplift and subsidence in snow zones caused by snow melting, subsidence in landfills and phase variations assumed to be caused by slope deformation.
SAR interferograms are formatted into tile data and can be browsed on a web map of GSI, "GSI Maps". GSI Maps enables us to superimpose SAR interferograms on various geospatial information provided by GSI such as topographic maps, aerial photographs, volcanic land condition maps and so on. This visualization enables us to easily compare SAR interferograms to other information like topography and geology and more robustly identify an area of ground surface deformations on the SAR interferograms.
We report SAR interferograms of ALOS-2, which are routinely covering all over Japan, and also challenges on InSAR analysis and system in the paper.
The Geospatial Information Authority of Japan (GSI) has conducted to monitor ground surface deformation of earthquakes, volcanic activities, subsidence and landslides throughout Japan by InSAR analysis using ALOS-2 data. With images obtained from InSAR analysis (hereinafter referred to as “SAR interferograms"), we have detected a lot of ground surface deformations caused by earthquakes and volcanic activities, subsidence derived from overuse of ground water, seasonal uplift and subsidence in snow zones caused by snow melting, subsidence in landfills and phase variations assumed to be caused by slope deformation.
SAR interferograms are formatted into tile data and can be browsed on a web map of GSI, "GSI Maps". GSI Maps enables us to superimpose SAR interferograms on various geospatial information provided by GSI such as topographic maps, aerial photographs, volcanic land condition maps and so on. This visualization enables us to easily compare SAR interferograms to other information like topography and geology and more robustly identify an area of ground surface deformations on the SAR interferograms.
We report SAR interferograms of ALOS-2, which are routinely covering all over Japan, and also challenges on InSAR analysis and system in the paper.