Rights statement: This is the author’s version of a work that was accepted for publication in Polar Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polar Science, 23, 2020 DOI: 10.1016/j.polar.2019.100501
Accepted author manuscript, 2.28 MB, PDF document
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Development of low-cost multi-wavelength imager system for studies of aurora and airglow
AU - Ogawa, Y.
AU - Tanaka, Y.
AU - Kadokura, A.
AU - Hosokawa, K.
AU - Ebihara, Y.
AU - Motoba, T.
AU - Gustavsson, B.
AU - Brändström, U.
AU - Sato, Y.
AU - Oyama, S.
AU - Ozaki, M.
AU - Raita, T.
AU - Sigernes, F.
AU - Nozawa, S.
AU - Shiokawa, K.
AU - Kosch, M.
AU - Kauristie, K.
AU - Hall, C.
AU - Suzuki, S.
AU - Miyoshi, Y.
AU - Gerrard, A.
AU - Miyaoka, H.
AU - Fujii, R.
N1 - This is the author’s version of a work that was accepted for publication in Polar Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Polar Science, 23, 2020 DOI: 10.1016/j.polar.2019.100501
PY - 2020/3/1
Y1 - 2020/3/1
N2 - This paper introduces a new system that can monitor aurora and atmospheric airglow using a low-cost Watec monochromatic imager (WMI) equipped with a sensitive camera, a filter with high transmittance, and the non-telecentric optics. The WMI system with 486-nm, 558-nm, and 630-nm band-pass filters has observable luminosity of about ~200–4000 Rayleigh for 1.07-sec exposure time and about ~40–1200 Rayleigh for 4.27-sec exposure time, for example. It is demonstrated that the WMI system is capable of detecting 428-nm auroral intensities properly, through comparison with those measured with a collocated electron-multiplying charge-coupled device (EMCCD) imager system with narrower band-pass filter. The WMI system has two distinct advantages over the existing system: One makes it possible to reduce overall costs, and the other is that it enables the continuous observation even under twilight and moonlight conditions. Since 2013 a set of multi-wavelength WMIs has been operating in northern Scandinavia, Svalbard, and Antarctica to study meso- and large-scale aurora and airglow phenomena. Future development of the low-cost WMI system is expected to provide a great opportunity for constructing a global network for multi-wavelength aurora and airglow monitoring.
AB - This paper introduces a new system that can monitor aurora and atmospheric airglow using a low-cost Watec monochromatic imager (WMI) equipped with a sensitive camera, a filter with high transmittance, and the non-telecentric optics. The WMI system with 486-nm, 558-nm, and 630-nm band-pass filters has observable luminosity of about ~200–4000 Rayleigh for 1.07-sec exposure time and about ~40–1200 Rayleigh for 4.27-sec exposure time, for example. It is demonstrated that the WMI system is capable of detecting 428-nm auroral intensities properly, through comparison with those measured with a collocated electron-multiplying charge-coupled device (EMCCD) imager system with narrower band-pass filter. The WMI system has two distinct advantages over the existing system: One makes it possible to reduce overall costs, and the other is that it enables the continuous observation even under twilight and moonlight conditions. Since 2013 a set of multi-wavelength WMIs has been operating in northern Scandinavia, Svalbard, and Antarctica to study meso- and large-scale aurora and airglow phenomena. Future development of the low-cost WMI system is expected to provide a great opportunity for constructing a global network for multi-wavelength aurora and airglow monitoring.
KW - Aurora
KW - Airglow
KW - Imager
KW - Polar ionoshpere
U2 - 10.1016/j.polar.2019.100501
DO - 10.1016/j.polar.2019.100501
M3 - Journal article
VL - 23
JO - Polar Science
JF - Polar Science
M1 - 100501
ER -