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Earth Planets Space, Vol. 59 (No. 6), pp. 585-599, 2007

Development of airglow temperature photometers with cooled-CCD detectors

K. Shiokawa1, Y. Otsuka1, S. Suzuki1, T. Katoh1, Y. Katoh1, M. Satoh1, T. Ogawa1, H. Takahashi2, D. Gobbi2, T. Nakamura3, B. P. Williams4,7, C.-Y. She4, M. Taguchi5, and T. Shimomai6

1Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa, Japan
2Instituto Nacional de Pesquisas Espaciais, INPE, So Josédos Campos, SP, Brazil
3Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan
4Department of Physics, Colorado State University, Fort Collins, Colorado, USA
5National Institute of Polar Research, Itabashi, Tokyo, Japan
6Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Japan
7NorthWest Research Associates, Colorado Research Associates division, Boulder, Colorado, USA

(Received May 9, 2006; Revised April 7, 2007; Accepted April 7, 2007; Online published June 27, 2007)

Abstract: We have developed three airglow temperature photometers with cooled-CCD detectors. The photometers measure rotational temperatures using the airglow emissions of OH and O2 near the mesopause region (altitude: 80-100 km). The photometers also measure six other airglow and auroral lines at wavelengths of 557.7, 630.0, 777.4, 589.3, 427.8, and 486.1 nm. The CCD detectors are used to distinguish the emission lines in these airglow bands, similarly to those used by the Spectral Airglow Temperature Imagers (SATI). In this paper, we describe the configuration of the photometers, their calibration, the data processing to extract rotational temperatures and emission intensities from the measured airglow spectra, as well as the initial deployment at Platteville, Colorado (40.2°N, 255.3°E), when their observations were compared with the concurrent and nearly collocated observations by a sodium lidar. We obtain a good correlation and some systematic difference of temperatures from the photometers and the lidar, and discuss possible causes of the temperature difference.
Key words: Airglow temperature photometers, airglow emissions, rotational temperature, cooled CCD, mesopause region.


Corresponding author E-mail: shiokawa@stelab.nagoya-u.ac.jp


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