This dataset includes Level 1B (L1B) data products from the MODIS/ASTER Airborne Simulator (MASTER) instrument. The spectral data were collected during 11 flights aboard a Cessna Caravan aircraft over California, Oregon, Washington, and Colorado, U.S., from 2004-09-15 to 2004-10-14. A focus of this deployment involved mapping volcanic landforms. Data products include L1B georeferenced multispectral imagery of calibrated radiance in 50 bands covering wavelengths of 0.460 to 12.879 micrometers at approximately 10-meter spatial resolution. The L1B...