High latitude airglow observations of correlated short-term fluctuations in the hydroxyl meinel 8-3 band intensity and rotational temperature |
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| Authors: | John W Meriwether |
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| Institution: | Photometrics, Inc., 442 Marrett Rd., Lexington, Massachusetts 02173, U.S.A. |
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| Abstract: | An application of a tilting filter photometer for the ground-based measurement of the atmospheric temperature at the mesopause altitude (~85km) is described. The technique uses selected rotational emission lines of the OH Meinel night airglow to determine a rotational temperature. A sampling rate of approximately one per minute with a precision of ±5K can be achieved with a field of view (4-km transverse at the mesopause height) sufficient to detect fine structure variations in the temperature and intensity. The systematic error of these measurements is comparable with those of rocket in situ measurements by falling spheres or parachute-borne thermistors. Results obtained March 1974, at Ester Dome, Alaska, indicate the presence of systematic fluctuations in the rotational temperature and the 8-3 band intensity of period 16 min and amplitude 2–4 per cent. |
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