A MODEL STUDY OF LOWER IONOSPHERE DURING SOLAR-FLARE EVENTS AND IONOSPHERIC ABSORPTION AT DELHI

Authors
SRIVASTAVA S NATH N SETTY CSGK
Citation
S. Srivastava et al., A MODEL STUDY OF LOWER IONOSPHERE DURING SOLAR-FLARE EVENTS AND IONOSPHERIC ABSORPTION AT DELHI, Indian journal of radio & space physics, 23(5), 1994, pp. 347-358
Citations number
NO
Categorie Soggetti
Metereology & Atmospheric Sciences","Astronomy & Astrophysics
Journal title
Indian journal of radio & space physics → ACNP
ISSN journal
03678393
Volume
23
Issue
5
Year of publication
1994
Pages
347 - 358
Database
ISI
SICI code
0367-8393(1994)23:5<347:AMSOLI>2.0.ZU;2-6
Abstract
A model study of lower ionospheric composition during solar flare even ts on 4, 6 and 7 Feb. 1986 is made using a simplified and a detailed i on chemical scheme. Results show an enhancement in electron density at 80 km by a factor of 5 or less and about 10 for moderate and strong f lares, respectively. A decrease in the cut-off level of cluster ions a nd that in the effective recombination coefficient are also noticed un der flare conditions. A comparison between computed and observed absor ption at 2.132 MHz measured at Delhi is also made.