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The Development of a Low-Cost, Near Infrared, High-Temperature Thermal Imaging System and Its Application to the Retrieval of Accurate Lava Lake Temperatures at Masaya Volcano, Nicaragua

1
Department of Geography, The University of Sheffield, Winter Street, Sheffield S10 2TN, UK
2
Department of Electronic and Electrical Engineering, The University of Sheffield, Portobello Centre, Pitt Street, Sheffield S1 4ET, UK
3
School of Geosciences, The University of Sydney, Sydney 2006, Australia
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(3), 450; https://doi.org/10.3390/rs10030450
Received: 29 January 2018 / Revised: 1 March 2018 / Accepted: 10 March 2018 / Published: 13 March 2018
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Abstract

Near infrared thermal cameras can provide useful low-cost imaging systems for high temperature applications, as an alternative to ubiquitous mid-/long-wavelength infrared systems. Here, we present a new Raspberry Pi-based near infrared thermal camera for use at temperatures of ≈>500 °C. We discuss in detail the building of the optical system, calibration using a Sakuma-Hattori model and quantification of uncertainties in remote temperature retrievals. We then present results from the deployment of the system on Masaya Volcano, Nicaragua, where the active lava lake was imaged. Temperatures reached a maximum of 1104 ± 14 °C and the lake radiative power output was found to range between 30 and 45 MW. To the best of our knowledge, this is the first published ground-based data on the thermal characteristics of this relatively nascent lava lake, which became visible in late 2015. View Full-Text
Keywords: thermal imaging; low-cost sensor; lava lake; Masaya volcano; Raspberry Pi; near infrared thermal imaging; low-cost sensor; lava lake; Masaya volcano; Raspberry Pi; near infrared
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wilkes, T.C.; Stanger, L.R.; Willmott, J.R.; Pering, T.D.; McGonigle, A.J.S.; England, R.A. The Development of a Low-Cost, Near Infrared, High-Temperature Thermal Imaging System and Its Application to the Retrieval of Accurate Lava Lake Temperatures at Masaya Volcano, Nicaragua. Remote Sens. 2018, 10, 450.

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