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Earth, Planets and Space

, Volume 57, Issue 2, pp e5–e8 | Cite as

A new technique of radiation thermometry using a consumer digital camcorder: Observations of red glow at Aso volcano, Japan

  • Takeshi Saito
  • Satoshi Sakai
  • Isao Iizawa
  • Eriko Suda
  • Kazuhiro Umetani
  • Katsuya Kaneko
  • Yoshitsugu Furukawa
  • Takahiro Ohkura
Open Access
E-Letter

Abstract

We newly developed a technique of radiation thermometry using a Sony’s consumer digital camcorder. Our system is not only convenience and cost effective but with a better performance than previous infrared thermometers, particularly in the place like a crater of volcano where is abundant in gas. This is because our system uses the submicron wavelength band, in which radiation is less influenced by absorption of gas than in the thermal infrared wavelength (>3 μm). We carried out observations of red glow at Aso volcano and succeeded in measuring the temperature of about 800°C, which is much more acceptable than previously reported values of 200–400°C. When we measure the temperature of about 300–700°C and 600–900°C in the place where is abundant in gas, using the camcorder with the near-infrared and with the visible wavelength mode is better than the thermal infrared region, respectively.

Key words

Thermometer submicron wavelength NightShot red glow Aso volcano 

References

  1. Ono, K., K. Watanabe, H. Hoshizumi, and S. Ikebe, Ash eruption of the Naka-dake crater, Aso volcano, southwestern Japan, J. Volcanol. Geotherm. Res., 66, 137–148, 1995.CrossRefGoogle Scholar
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  4. Rothery, D. A., P. W. Francis, and C. A. Wood, Volcano monitoring using short wavelength infrared data from satellites, J. Geophys. Res., 93, 7993–8008, 1988.CrossRefGoogle Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2005

Authors and Affiliations

  • Takeshi Saito
    • 1
  • Satoshi Sakai
    • 2
  • Isao Iizawa
    • 2
  • Eriko Suda
    • 3
  • Kazuhiro Umetani
    • 2
  • Katsuya Kaneko
    • 2
  • Yoshitsugu Furukawa
    • 4
  • Takahiro Ohkura
    • 4
  1. 1.Institute for Geothermal Sciences, Graduate School of ScienceKyoto UniversityBeppu, OitaJapan
  2. 2.Graduate School of Human and Environmental StudiesKyoto UniversityKyotoJapan
  3. 3.Ministry of the EnvironmentTokyoJapan
  4. 4.Aso Volcanological Laboratory, Graduate School of ScienceKyoto UniversityKumamotoJapan

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