Study of the [OI] green line at Mount Abu

Details Study of the [OI] green line at Mount Abu Study of the [OI] green line at Mount Abu

Feb 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965jatp...27..245d&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 27, no. 2, pp. 245-257

Physics

Scientific paper

The all sky observations at Mount Abu with photoelectric photometers using 5577 Å and 5300 Å interference filters were used 1. (1) to determine the height of the emitting layer of the [OI] green radiation by the use of the Van Rhijn method, 2. (2) to study the variation of the [OI] green line in the meridional plane and all over the sky, and 3. (3) to estimate the size of the airglow cells. The Van Rhijn method though crude yielded a height of about 100 km for the layer emitting the [OI] green line emission. The single and two colour methods used for applying the Van Rhijn technique are discussed. The study of the isophote maps in the meridional plane and all over the sky show a patchy and dynamic structure of the airglow supporting the hypothesis of airglow cells as suggested by Roach (1955). The size of the cells is estimated to be of the order of 2500 km. In this connection additional evidence is presented by comparing the day-to-day variations of the [OI] green line at different stations.

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