Singh, Vir and Upadhayaya, A. K. and M. V., Sunil Krishna
(2010)
Modeling of redline dayglow emission.
IDOJARAS, 114 (3).
pp. 217-227.
ISSN 0324-6329
Abstract
The present paper deals with the morphological study of redline dayglow emission. The morphology is obtained from the profiles of redline dayglow emission using the updated Glow model. The Glow model is updated in terms of measured various collisional cross sections and reaction rate coefficients. The volume emission rate is obtained for some specific cases (18.3°S, 99.0°E, at 7:33 a.m. on February 1, 1993, 1.3°N, 139.0°E, at 11:30 a.m. on February 11, 1993, 35.2°S, 197.0°E, at 3:13 p.m. on April 2, 1993, and 52.9°S, 207.0°E, at 3:45 p.m. on April 9, 1993) using updated Glow model, and the results are compared with WINDII measurements. The modeled emission rate is found in good agreement with the WINDII observations at all altitudes except in the peak region where model underestimates the WINDII observations within 25%. The updated Glow model is further used to obtain the morphology of redline emission under equinox conditions (for the months of March and April, 1993) between 50°S and 50°N latitudes. It has been found that this emission shows an asymmetry between the Northern and Southern Hemispheres under equinox conditions. The asymmetry in the thermospheric region is likely due to the changing contributions with altitude of the various sources which are responsible for the production of O(1D) during daytime. The daytime intensity variation is found quite consistent with the WINDII measurements under equinox conditions.
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