Sea ice co ncentration and type analysis from dual pol Radarsat-2 and Modis images in the Baltic Sea

A sea ice classification technique is introduced. The classification was performed on Radarsat-2 dual polarization image (07.02.2009) and MODIS images (09.02.2009) that covered coastal area in the western part of Baltic Sea. The classification on SAR image was based on Shannon entropy differences that occur on various ice types. Analysis showed that four ice types (water, fast ice, ridged ice and deformed ice) were identifiable. Also two independent analysis were performed on MODIS image. The spectral classification enabled to separate ridged ice regions and fast ice areas. Using histogram analysis ice concentration map was created. The analysis of Modis image enabled to identify regions where water was covering ice surface. The same phenomena was also detected from SAR data.