MONITORING ICE COVERING LAKE SAROMA BY USING SENTINEL-1 C-BAND SAR DATA

Abstract

The objective of this study is to investigate the backscattering characteristics of ice covering Lake Saroma observed by Sentinel-1 C-band SAR data. In-situ observation measuring snow depth and ice thickness was conducted at more than 100 sampling points on Lake Saroma in February 2019. We also tried to apply interferometric SAR data analysis for the data pair acquired during the period from Feb.11 to Mar.7. The C-band SAR backscattering coefficients in both VV and VH have the maximum values at 30 to 35 cm of the ice thickness, and the relatively significant correlation found in the east part of the lake. We also find that the phase difference presumably caused by a tidal change in several areas surrounded the lake. In the relatively thick ice area, the coherence decreases with ice thickness, which is caused by the dominant scattering mechanism change.