[STT48-P11] PALSAR-2 InSAR image production using 5m- and 10m-resolution Digital Elevation Model in Northern Nagano Prefecture, Japan
Keywords:ALOS-2, InSAR, Landslide
Type I DEHM was produced from 5m DEMs (DgitalElevation Models) and Japanese Geoid height data 2011 (Miyahara et al., 2014), published by GSI of Japan. In the area where 5m DEMs are not published, 10m DEMs were used and interpolated into 5m resolution.
Type II DEHM was produced from 10m DEMs. In the area where 5m DEMs are published, these data were resampled into 10m resolution. Japanese Geoid height data 2011 was also used.
Type III DEHM was produced from only 10m DEMs, and EGM96 was used as geoid height data.
As a result, it was found that Type III DEHM tends to give best coherence of InSAR image. In the future it will be considered that how well the Type III DEHM works to detect landslide surface deformation in the study area. This study used PALSAR-2 data provided by JAXA, in the special study (B) in 2017, ERI, Tokyo Univ. and Type III DEHM was also provided in the special study.
Miyahara et al., 2014, http://www.gsi.go.jp/common/000099005.pdf
Ozawa et al., 2016, doi: 10.1186/s40623-016-0563-5.
Tobita et al., 2005, http://www.gsi.go.jp/common/000024818.pdf