New auroral spectrometer using an acousto-optic tunable filter
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概要
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This paper reports the performance and capability of a newly developed zenith spectrometer (for measurements of airglow and aurora) that uses an acousto-optic tunable filter (AOTF). The AOTF can scan the pass-band of the spectrometer between 450 and 700 nm with a bandwidth of 2-3 nm by changing the RF driver frequency from 180 to 100 MHz. The absolute sensitivity of the spectrometer is 〜0.1-1.5 counts/Rayleigh/s per spectral step. The spectrometer is fully automated. The O I (557.7 nm) airglow line can be clearly identified in test observations of midlatitude airglow performed at Shigaraki Observatory, Japan. Based on an estimate of the signal-to-noise ratio, we conclude that the full auroral spectrum (450-700) nm can be measured by the AOTF spectrometer with a time resolution of 〜100 s and a signal-to-noise ratio of 〜100 for an auroral emission intensity of 10 kR. An example of the auroral spectra is shown for observations made at Syowa Station in Antarctica.
- 国立極地研究所の論文
著者
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Shiokawa Kazuo
Solar-Terrestrial Environmental Laboratory, Nagoya University
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Taguchi Makoto
National Institute of Polar Research
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Yamagishi Hisao
National Institude of Polar Research
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Ogawa Tadahiko
Solar-Terrestrial Environment Laboratory,Nagoya University
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Ogawa Tadahiko
Solar-terrestrial Environment Laboratory Nagoya University
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Shiokawa Kazuo
Solar Terrestrial Environment Laboratory Nagoya University
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Katoh Yasuo
Solar-Terrestrial Environment Laboratory, Nagoya University
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Satoh Mitsugi
Solar-Terrestrial Environment Laboratory, Nagoya University
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Satoh Mitsugi
Solar-terrestrial Environment Laboratory Nagoya University
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Katoh Yasuo
Solar-terrestrial Environment Laboratory Nagoya University
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