Temperature distribution analysis of July 2001 Mt. Etna eruption observed by the airborne hyperspectral sensor MIVIS

On 17th and 18th July 2001, several fractures opened on Mt. Etna southern flank generating different lava flows
 spreading both in Valle del Bove and towards Nicolosi. On 29th July the image spectrometer MIVIS was flown
 over Mt. Etna to acquire high-resolution images of the eruption. The MIVIS airborne campaign was planned simultaneously
 with TERRA, EO-1 and Landsat 7 satellite acquisitions, in order to compare hyperspectral and
 multispectral data referred to active lavas. This work focuses on the thermal mapping of lava flows, taking advantage
 of MIVIS sensor high technical performances. The MIVIS high spatial resolution allows a detailed
 analysis of the lava flow topographic distribution. Its 12 bit dynamic range consents an estimate of the temperature
 even for the «hottest» pixels. The main target of this work is the evaluation of the energy flux by means of
 remote-sensing techniques. Surface temperature analysis was performed on distinct lava flows using the dualband
 technique. These quantities were compared with the integrated temperatures retrieved using the MIVIS
 thermal infrared bands. The influence of topography was also considered in the flux calculation using a Digital
 Elevation Model (DEM) of Mt. Etna