Depending on the incidence angle of SAR systems, the proportion of the incident energy in diffuse scattering directed back toward the sensor will be different. For example, in RADARSAT-2 satellite images acquired with incident angles from 20 to 50 degrees, rougher ice surfaces result in higher backscatter amounts received by the sensor and appear relatively brighter in the image [13]. As such, when classifying river ice covers it is sometimes challenging to separate ice surfaces from areas of rapids or under high current and wind conditions along a given river.