The FOW3 product, with dual co- and cross-polarizations of HH and HV, was used to classify river-ice types in the two winter seasons from 2013 to 2015 in the Slave River Delta channel, and to analyze variations in the ice cover during winter 2014. Since we did not have enough FOW3 images in winter 2015 for the calculation of ice cover variance, the FQ17W images were used to analyze the variation in the ice cover during winter 2015 (Table 1). The FQ17W mode offers full polarizations (HH+VV+HV+VH) at a smaller swath of approximately 50 km, covering any area from 35.7 to 38.6 incidence angle degree. The nominal resolution of FQ17W images is 5.2 ×7.6 m [27].