Characterization and initial field test of an 8–14 μm thermal infrared hyperspectral imager for measuring SO2 in volcanic plumes

Gabrieli, Andrea; Wright, Robert J.; Lucey, P. G.; Porter, John N.; Garbeil, H.; Pilger, E.; Wood, Mark

doi:10.1007/s00445-016-1068-6

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…The hyperspectral imager features 35 bands in the 8–13‐μm wavelength range with a spectral resolution of 13.3 cm −1 . The instrument is optically identical to an instrument described in Gabrieli et al () and was repackaged for improved field portability by Spectrum Photonics (Figure ). The instrument is operated as a panoramic push broom imager with a vertical field of view of 9° sampled by 1276 × 200 pixels.…”

Section: Methodsmentioning

confidence: 99%

Incorporation of Portable Infrared Spectral Imaging Into Planetary Geological Field Work: Analog Studies at Kīlauea Volcano, Hawaii, and Potrillo Volcanic Field, New Mexico

Ito

Rogers

Young

et al. 2018

Earth and Space Science

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During geological work for future planetary missions, portable/hand‐held infrared spectral imaging instruments have the potential to significantly benefit science objectives. We assess how ground‐based infrared spectral imaging can be incorporated into geological field work in a planetary setting through a series of field campaigns at two analog sites: Kīlauea Volcano, Hawaii, and Potrillo Volcanic Field, New Mexico. For this study, we utilize thermal infrared emission spectroscopy (8–13 μm) because this wavelength range is sensitive to major silicate spectral features and covers the terrestrial atmospheric window; however, our conclusions are applicable to other forms of infrared imaging (e.g., near‐infrared reflectance spectroscopy). We demonstrate the ways in which spectral imaging could potentially enhance the science return and/or efficiency of traditional geological field work. Benefits include the following: documentation of major compositional variations within scenes, the ability to detect visually subtle and/or concealed variability in (sub) units, and the ability to characterize remote and/or inaccessible outcrops. These advantages could help field workers rapidly document sample context and develop strategic work plans. Furthermore, ground‐based imaging provides a critical link between orbital/aerial imaging scales and sampling scales. Last, infrared spectral imaging data may be combined with in situ measurement techniques, such as X‐ray fluorescence, as well as other ground‐based remote sensing techniques, such as LIDAR (Light Detection And Ranging), to maximize geological understanding of the work area.

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Section: Methodsmentioning

confidence: 99%

Incorporation of Portable Infrared Spectral Imaging Into Planetary Geological Field Work: Analog Studies at Kīlauea Volcano, Hawaii, and Potrillo Volcanic Field, New Mexico

Ito

Rogers

Young

et al. 2018

Earth and Space Science

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“…Disadvantages include complicated set-up (FT-IR), usually cryogenic cooling of the detector is required. However recently also non-dispersive detection with detectors at room temperature was demonstrated [56,57]. The classic approach is the differential one sketched in Figure 6, using the difference between two measurements, one pointing into the plume and one pointing next to the plume into the background sky, e.g., [54,58].…”

Section: Thermal Emission Spectroscopic Techniquesmentioning

confidence: 99%

“…Then, they used the series of images to simultaneously estimate the plume average wind speed and the constituent outflux from the crater. Current developments toward imaging FTIRs (e.g., [57,60]) are promising for use in volcano plume monitoring since they allow for rapidly imaging the thermal emission spectrum emerging from two-dimensional scenes without the need for scanning a telescope.…”

Section: Thermal Emission Spectroscopic Techniquesmentioning

confidence: 99%

“…A recent development based on a special type of interferometer (Sagnac interferometer) is the Thermal Hyperspectral Imager, which produces a spatial interferogram across the field of view, which is scanned across the image. After Fourier transformation a high resolution spectrum for each image pixel is obtained [57] (Gabrieli et al 2016), which can be analysed for spectral signatures of volcanic gases. Gabrieli et al [57,78] used such a device to produce images of the SO 2 distribution derived from spectra around 8.6 µm at a spectral resolution of about 0.25 µm.…”

Section: Categories Of Plume Imagingmentioning

confidence: 99%

“…After Fourier transformation a high resolution spectrum for each image pixel is obtained [57] (Gabrieli et al 2016), which can be analysed for spectral signatures of volcanic gases. Gabrieli et al [57,78] used such a device to produce images of the SO 2 distribution derived from spectra around 8.6 µm at a spectral resolution of about 0.25 µm. Explorative measurements were made at Kilauea Halema'uma'u crater (Hawaii) with a scan duration of 1 s. (3) Frame at a time scanning ("full frame" imaging, see Figure 7C): Here the entire frame is recorded at once (or in a sequence of steps in time).…”

Section: Categories Of Plume Imagingmentioning

confidence: 99%

See 2 more Smart Citations

Ground-Based Remote Sensing and Imaging of Volcanic Gases and Quantitative Determination of Multi-Species Emission Fluxes

2018

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The physical and chemical structure and the spatial evolution of volcanic plumes are of great interest since they influence the Earth's atmospheric composition and the climate. Equally important is the monitoring of the abundance and emission patterns of volcanic gases, which gives insight into processes in the Earth's interior that are difficult to access otherwise. Here, we review spectroscopic approaches (from ultraviolet to thermal infra-red) to determine multi-species emissions and to quantify gas fluxes. Particular attention is given to the emerging field of plume imaging and quantitative image interpretation. Here UV SO 2 cameras paved the way but several other promising techniques are under study and development. We also give a brief summary of a series of initial applications of fast imaging techniques for volcanological research.

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Gas and Thermal Emissions of Volcanoes

Gabrieli,

Wright

2024

Remote Sensing for Characterization of Geohazards and Natural Resources

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Characterization and initial field test of an 8–14 μm thermal infrared hyperspectral imager for measuring SO2 in volcanic plumes

Cited by 11 publications

References 25 publications

Incorporation of Portable Infrared Spectral Imaging Into Planetary Geological Field Work: Analog Studies at Kīlauea Volcano, Hawaii, and Potrillo Volcanic Field, New Mexico

Incorporation of Portable Infrared Spectral Imaging Into Planetary Geological Field Work: Analog Studies at Kīlauea Volcano, Hawaii, and Potrillo Volcanic Field, New Mexico

Ground-Based Remote Sensing and Imaging of Volcanic Gases and Quantitative Determination of Multi-Species Emission Fluxes

Gas and Thermal Emissions of Volcanoes

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