Development of a motion vector field model of an unstable slope using terrestrial radar interferometry

200 kilometres southeast by south of Fairbanks, Alaska lies the Fels Glacier valley where within, several sections of the northern slope are experiencing active deep-seated gravitational slope deformation. High-temporal resolution terrestrial radar imagery of the westernmost such section was acquired over the course of a 3-day field campaign in July 2017. These data were analyzed using interferometric techniques with the goal of extracting the rate of deformation across the 3-kilometre-wide section. The analysis and resulting motion vector field model reveal the extent and relative magnitude of the most actively deforming region located at the base of the slope with respect to the main body of the slope as observed over the short duration of the campaign.