Monitoring of east antarctic marginal zone using ALOS / PALSAR data

This study applies various kinds of analytical method of SAR data and evaluate the potential ability of ALOS / PALSAR data for Antarctic research. Offset tracking is almost able to apply for glacier analysis and showed the consistency with manual interpretation results. The flow velocity estimation results show approximately 2100 m/a at the grounding line of Shirase glacier and 300-700 m/year at the eastern part of Riiser-Larsen Peninsula. From the time series analysis of ice shelf over three decades showed quite stable state of flow velocity around Lützow-Holm Bay. Grounding line analysis by PALSAR is succeeded by applying 3 pass InSAR method. 2pass InSAR method cannot extract grounding line because fringe due to flow of ice overlaid with tidal fringe and it is impossible to distinguish them. However, 3pass InSAR can remove fringe due to flow of ice and successfully extracted the grounding line from the interferogram. These results encourage us for the cryospheric applications for ALOS-2 satellite.