Summary
In this note we report preliminary measurements of sodium twilight emissions showing the variation of theD 2 /D 1 ratio during twilight at solar depression angles α as low as 3.5°.
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References
J. Albano, J. E. Blamont, M. L. Chanin andM. Petididier,Observation of the dayglow at the resonance wavelength of sodium and potassium. Seasonal and diurnal variation, Ann. Geophys.26 (1970), 151.
T. M. Donahue, R. Resnick andV. R. Stull,Distribution in the upper atmosphere of sodium atoms excited by sunlight, Phys. Rev.104 (1956), 873.
T. M. Donahue andR. Resnick,Resonance absorption of sunlight in twilight layers, Phys. Rev.98 (1955), 1622.
M. Gadsden andL. M. Purdy,Observation of the sodium dayglow, Ann. Geophys.26 (1970), 43.
R. L. Gattinger,D-region nightglow, to be published inThe Radiating Atmosphere (Reidel Publish. Co., 1971).
E. A. Hesstvedt,Theoretical study of the diurnal variation of hydroxyl emission, J. Geophys. Res.75 (1970), 2337.
D. M. Hunten,Surface albedo and the filling-in of Fraunhofer lines in the day sky, Astrophys. J.159 (1970), 1107.
D. M. Hunten,Spectroscopic studies of the twilight airglow, Space Sci. Rev.6 (1967), 493.
D. M. Hunten,Transmission functions for twilight studies, J. Atmos. Terr. Phys.24 (1962), 333.
G. I. Kvifte andL. A. Wallace,Method of determining the atmospheric sodium concentration from twilight observations, Planet. Space. Sci.18 (1970), 623.
E. J. Llewellyn andW. F. J. Evans,The dayglow, to be published inThe Radiating Atmosphere (Reidel Publish. Co., 1971).
J. F. Noxon.Day airglow, Space Sci. Rev.8 (1968), 92.
H. N. Rundle,Dayglow and twilight excitation mechanism for airglow, to be published inThe Radiating Atmosphere (Reidel Publish. Co., 1971).
M. C. W. Sandford andA. J. Gibson,Laser radar measurement of the atmospheric sodium Layer, J. Atmos. Terr. Phys.32 (1970), 1432.
T. Shimazaki andA. R. Laird,A model calculation of the diurnal variation in minor neutral constituents in the mesosphere and lower thermosphere including transport effects, J. Geophys. Res.75 (1970), 3221.
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Visconti, G., Fiocco, G. Sodium twilight emission measured with a tilting filter photometer. PAGEOPH 91, 166–170 (1971). https://doi.org/10.1007/BF00879566
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DOI: https://doi.org/10.1007/BF00879566