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Proceedings Paper

Different methods for temperature and spectral emissivity retrieval over active fires from IR hyperspectral remotely sensed data
Author(s): Alessandro Barducci; Paolo Marcoionni; Ivan Pippi
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Paper Abstract

We have developed a theoretical model which allows us to retrieve the temperature of burning areas employing the thermal infrared spectral-radiance data gathered by the used sensor. The algorithm performs the temperature-emissivity separation by coupling together radiance data from a pair of neighbouring similar image pixels, which are assumed to have the same emissivity spectrum and independent temperatures. The characteristic uncertainty in the basic thermal infrared equations is thus resolved using a double number of spectral measurements (radiance samples) for the temperature estimation. Results produced by this model have been compared with fire-front temperatures assessed utilising spectral data collected at short-wave infrared wavelengths between 1.99 μm and 2.48 μm. Moreover, we have also applied the GBE-method for retrieving the pixel temperature and spectral emissivity utilising thermal infrared spectral data. In order to test the three considered methods, we have utilised a rare example of airborne hyperspectral image acquired over a natural active fire. This image was collected by the MIVIS operated on board of a Casa 212 airplane over the Alps (Italy). The paper shows the image acquired by the MIVIS sensor, the related processing and is completed with a theoretical discussion of the involved topics.

Paper Details

Date Published: 10 November 2003
PDF: 9 pages
Proc. SPIE 5152, Infrared Spaceborne Remote Sensing XI, (10 November 2003); doi: 10.1117/12.504560
Show Author Affiliations
Alessandro Barducci, Nella Carrara Institute for Applied Physics, CNR (Italy)
Paolo Marcoionni, Nella Carrara Institute for Applied Physics, CNR (Italy)
Ivan Pippi, Nella Carrara Institute for Applied Physics, CNR (Italy)

Published in SPIE Proceedings Vol. 5152:
Infrared Spaceborne Remote Sensing XI
Marija Strojnik, Editor(s)

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