RADARSAT derived monthly ice motion estimates for the Beaufort Sea, 1997-2014

Ice motion estimates were derived from RADARSAT-1 and RADARSAT-2 ScanSAR imagery using the Canadian Ice Service Automated Sea Ice Tracking System (CIS-ASITS). The system applies a combination of cross-correlation and phase-correlation methods of feature tracking to sequential SAR-image pairs. Ice drift vectors of varying confidence levels are produced from examining the image pairs at multiple resolution levels. Estimates were gridded at 200 m pixel resolution and organized by month. Using outputs produced by the CIS-ASITS process, bearing and speed were calculated to produce velocity data. Ice velocity map products were generated by bi-linearly interpolating the monthly estimates to 5km and 25km grids.