Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/14442
Authors: | Lombardo, Valerio* Pick, Leonie* Spinetti, Claudia* Taddeucci, Jacopo* Zakšek, Klemen* |
Title: | Temperature and Emissivity Separation ‘Draping’ Algorithm Applied to Hyperspectral Infrared Data | Journal: | Remote Sensing | Series/Report no.: | /12(2020) | Publisher: | MDPI | Issue Date: | 2020 | DOI: | 10.3390/rs12122046 | Keywords: | temperature–emissivity separation Draping thermal remote sensing Lab experiment |
Subject Classification: | 04.08. Volcanology solid Earth |
Abstract: | In the presented work, the spectral emissivity of basaltic melts at magmatic temperatures was retrieved in a laboratory-controlled experiment by measuring their spectral radiance. Granulated bombs of Etnean basalts were melted and the radiant energy from the melting surface was recorded by a portable spectroradiometer in the short wavelength infrared (SWIR) spectral range between 1500 and 2500 nm. The Draping algorithm, an improved algorithm for temperature and emissivity separation, was applied for the first time to SWIR hyperspectral data in order to take into account the non-uniform temperature distribution of the melt surface and, at the same time, solving the two temperatures and the spectral emissivity. The results have been validated by comparing our results with the emissivity measured at a "lava simulator". Basalt spectral emissivity does not vary significantly at magmatic temperature, but shows an absorption feature in the range 2180–2290 nm, an atmospheric window pivotal for the IR remote sensing of active volcanoes |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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remotesensing-12-02046-v2.pdf | 2.59 MB | Adobe PDF | View/Open |
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