Study of the (4–1) and (5–2) Hydroxyl Bands in the Night Airglow

1971 ◽  
Vol 49 (19) ◽  
pp. 2509-2517 ◽  
Author(s):  
A. W. Harrison ◽  
W. F. J. Evans ◽  
E. J. Llewellyn
Keyword(s):  
Seasonal Variation ◽  
Rotational Temperature ◽  
Band Intensity ◽  
K Value ◽  
Intensity Fluctuations ◽  
Single Night ◽  
Summer Minimum ◽  
Night Airglow

A 1 year study of the (4–1) and (5–2) hydroxyl bands in the night airglow near 1 μ has revealed a non-uniform rotational temperature across the P branch of each band. The temperature increases with K′ value. There is a pronounced seasonal variation of temperature showing a summer minimum and winter maximum. The average measured brightness for the (4–1) band is 4.6 kR (winter) and 3.5 kR (summer), and for the (5–2) band is 5.8 kR (winter) and 4.3 kR (summer). It is shown that the time-averaged total band intensity fluctuations during a single night are quite large, sometimes a factor of 2, and are not definitely correlated with the rotational temperature during the same period.

Night Airglow Observations from Orbiting Spacecraft Compared with Measurements from Rockets

Science ◽  
1963 ◽  
Vol 140 (3571) ◽  
pp. 1087-1089 ◽  
Author(s):  
M. J. Koomen ◽  
I. S. Gulledge ◽  
D. M. Packer ◽  
R. Tousey
Keyword(s):  
Orbiting Spacecraft ◽  
Night Airglow

Faint OH (ν′ = 10),17OH, and18OH Emission Lines in the Spectrum of the Night Airglow

1998 ◽  
Vol 110 (754) ◽  
pp. 1499-1510 ◽  
Author(s):  
Donald E. Osterbrock ◽  
Jon P. Fulbright ◽  
Philip C. Cosby ◽  
Thomas A. Barlow
Keyword(s):  
Emission Lines ◽  
Night Airglow

scholarly journals Post midnight spread-F occurrence over Waltair (17.7° N, 83.3° E) during low and ascending phases of solar activity

2003 ◽  
Vol 21 (3) ◽  
pp. 745-750 ◽  
Author(s):  
K. Niranjan ◽  
P. S. Brahmanandam ◽  
P. Ramakrishna Rao ◽  
G. Uma ◽  
D. S. V. V. D. Prasad ◽  
...  
Keyword(s):  
Solar Activity ◽  
Atmospheric Composition ◽  
Activity Period ◽  
Sunspot Activity ◽  
Low Latitude ◽  
F Region ◽  
Composition And Structure ◽  
Spread F ◽  
Solar Activity Period ◽  
Night Airglow

Abstract. A study carried out on the occurrence of post midnight spread-F events at a low-latitude station, Waltair (17.7° N, 83.3° E), India revealed that its occurrence is maximum in the summer solstice months of the low solar activity period and decreases with an increase in the sunspot activity. The F-region virtual height variations show that 80% of these spread-F cases are associated with an increase in the F-region altitude. It is suggested with the support of the night airglow 6300 A zenith intensity data obtained with co-located ground-based night airglow photometer and electron temperature data from the Indian SROSS C2 satellite that the seasonal variation of the occurrence and probable onset times of the post midnight spread-F depend on the characteristics of the highly variable semipermanent equatorial Midnight Temperature Maximum (MTM).Key words. Ionosphere (ionospheric irregularities; ionosphere atmosphere interactions) Atmospheric composition and structure (airglow and Aurora)

A discussion on infared astronomy - The emission spectrum of the night airglow from 2 to 4μm

1969 ◽  
Vol 264 (1150) ◽  
pp. 161-161
Keyword(s):  
Infrared Spectrum ◽  
Emission Spectrum ◽  
High Altitude ◽  
Emission Band ◽  
Night Airglow

The infrared spectrum of the airglow in the region 2 to 4 μm has been measured with a two-beam interferometer carried to high altitude by a balloon. The aV= 1 sequence of OH bands is in evidence as well as an emission band of CO 2 .

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