This dataset includes Level 1B (L1B) data products from the MODIS/ASTER Airborne Simulator (MASTER) instrument. The spectral data were collected during three flights aboard a DOE B-200 aircraft over Phoenix, Arizona, and the Jornada Experimental Range (JORNEX) in New Mexico, U.S., on 2003-04-28 to 2003-05-02. These data were used to evaluate the Temperature Emissivity Separation (TES) algorithm for extracting land surface temperature and emissivity data from thermal infrared data from ASTER. This deployment was coordinated...