Development of airglow temperature photometers with cooled-CCD detectors

Abstract

We have developed three airglow temperature photometers with cooled-CCD detectors. The photometers measure rotational temperatures using the airglow emissions of OH and O 2 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.

Atmospheric wave induced O<sub>2</sub> and OH airglow intensity variations: effect of vertical wavelength and damping

“…3 in series) with a cooled-CCD detector, developed by Solar-Terrestrial Environment Laboratory (STEL), Nagoya University. The photometer characteristics, data processing, and the rotational temperature calibration procedure have been reported by Shiokawa et al (2007). The rotational line spectrum of the O 2 and OH bands formed by a narrow band interference filter and lens system is focused on a cooled CCD camera.…”

“…A good linear correlation between the two temperatures was found, but with a bias. Hence, the rotational temperatures were corrected using the Na lidar temperature by Shiokawa et al (2007).…”

Cálculo do parâmetro η de Krassovsky das emissões do airglow do O2(0-1) e OH(6-2)

“…O comprimento de onda utilizado para o cálculo da temperatura foi entre 840,7 e 847,7 nm para a emissão do OH(6-2), e entre 865,91 e 867,07 nm para a emissão do O 2 (0-1). Detalhes adicionais relacionadosà obtenção desses parâmetros podem ser encontrados em Shiokawa et al (2007). O 2 foi de 0,16 R para a intensidade e 0,26 K para a temperatura.…”

Ground-based airglow imaging interferometer Part 1: instrument and observation

“…These observations are achieved by employing the tilting-filter photometers [14] and the imaging photometers [15], such as the mesopause oxygen rotational temperature imager (MORTI) [16] and the spectral airglow temperature imager (SATI) [17].…”