Patterns of glacier basal motion across southcentral Alaska from cross-correlation of Landsat imagery

William H Armstrong Jr, Institute of Arctic and Alpine Research, Boulder, CO, United States, Robert S Anderson, University of Colorado, Boulder, Department of Geological Sciences, Boulder, United States, Mark A Fahnestock, University of Alaska Fairbanks, Fairbanks, AK, United States and Allen Pope, National Snow and Ice Data Center, Boulder, CO, United States