NASA UAVSAR false color image of Little Sitkin collected by a NASA flight on July 22, 2009. UAVSAR is a reconfigurable, polarimetric L-band synthetic aperture radar (SAR) specifically designed to acquire airborne repeat track SAR data for differential interferometric measurements. See this link for the original data: http://uavsar.jpl.nasa.gov/cgi-bin/product.pl?jobName=aleutn_27702_09050_004_090722_L090_CX_01#data
UAVSAR data courtesy NASA/JPL-Caltech