Mahajan, K. K. ; Jain, V. C. ; Kohli, R. (1982) Ion-neutral collision frequency variations in the lower thermosphere from incoherent scatter measurements Indian Journal of Radio and Space Physics, 11 . pp. 225-228. ISSN 0367-8393
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Official URL: http://adsabs.harvard.edu/abs/1982IJRSP..11..225M
Abstract
Incoherent scatter measurements of ion-neutral collision frequency (vm) in the lower thermosphere at Arecibo (18.4 deg N 67 deg W) are analyzed for the period Aug. 1974 to May 1977. Results indicate a gradual increase of vm from morning to evening in summer by about a factor of two. This behavior reverses in winter when the value decreases from morning to evening. The ion-neutral collision frequency also shows large variability from one observation to next. These results are discussed in relation to static diffusion models which assume constant boundary conditions at the turbopause.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to National Institute of Science Communication and Information Resources. |
| Keywords: | Atmospheric Density; Collision Rates; Gas-ion Interactions; Ionic Collisions; Turbopause; Annual Variations; Atmospheric Composition; Atmospheric Diffusion; Diurnal Variations; Incoherent Scatter Radar; Molecular Collisions; Neutral Gases; Nitrogen; Reference Atmospheres |
| ID Code: | 75192 |
| Deposited On: | 22 Dec 2011 03:32 |
| Last Modified: | 22 Dec 2011 03:32 |
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