Temperature and Emissivity Separation ‘Draping’ Algorithm Applied to Hyperspectral Infrared Data
Open Access
- 24 June 2020
- journal article
- research article
- Published by MDPI AG in Remote Sensing
- Vol. 12 (12), 2046
- https://doi.org/10.3390/rs12122046
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.This publication has 50 references indexed in Scilit:
- Field validation of the ASTER Temperature–Emissivity Separation algorithmRemote Sensing of Environment, 2009
- Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glassesGeophysical Research Letters, 2007
- Lava flow thermal analysis using three infrared bands of remote-sensing imagery: A study case from Mount Etna 2001 eruptionRemote Sensing of Environment, 2006
- A multi-disciplinary study of the 2002?03 Etna eruption: insights into a complex plumbing systemBulletin of Volcanology, 2004
- Recovery of spectral emissivity from Thermal Infrared Multispectral Scanner imagery acquired over a mountainous terrain A case study from Mount Etna SicilyRemote Sensing of Environment, 2002
- Discrimination of lava dome activity styles using satellite-derived thermal structuresJournal of Volcanology and Geothermal Research, 2000
- Mass flux measurements at active lava lakes: Implications for magma recyclingJournal of Geophysical Research, 1999
- Calculation of lava effusion rates from Landsat TM dataBulletin of Volcanology, 1998
- Remote sensing of heat, lava and fumarole emissions from Erta 'Ale volcano, EthiopiaInternational Journal of Remote Sensing, 1997
- A chronology of the 1991 to 1993 Mount Etna eruption using advanced very high resolution radiometer data: Implications for real‐time thermal volcano monitoringJournal of Geophysical Research, 1997