Development of algorithms to increase estimation accuracy of surface displacement using PSInSAR analysis, and understanding complex surface displacement phenomena

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H06843
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Fukada Geological Institute
• Principal Investigator: Ishitsuka Kazuya 公益財団法人深田地質研究所, その他部局等, 研究員 (90756470)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Keywords: 地表変動 / PSInSAR解析 / 偏波 / 推定精度 / 関東平野 / 地すべり / 地盤沈下

Outline of Final Research Achievements

Persistent scatterer interferometry (PSInSAR) is a satellite-based method to estimate time-series surface displacement with high spatial density. During the series of researches, I revealed the complex surface displacement phenomena and underlying mechanism. Moreover, I developed a new algorithm that increase the estimation accuracy and spatial density of surface displacement.(1)We clarified estimation accuracy of surface displacement by PSInSAR analysis of Japanese SAR satellite, ALOS/PALSAR.(2)We developed a new computer algorithm that increase estimation accuracy and spatial density of surface displacement compared with conventional PSInSAR algorithm.(3)We revealed ground subsidence and uplift around large areas of the Kanto plain (100*100 km2), and clarified spatial distribution of surface displacement. We also revealed landslide displacement around the southwest side of Mt. Hakusan. Based on spatial distribution of surface displacement, we identified active landslide blocks.

Free Research Field

地質工学、リモートセンシング