Analysis of ionospheric response to solar flares at Kunming site

Author

Na Li ; Zonghua Ding ; Jinsong Chen ; Zhengwen Xu

Author_Institution

China Res. Inst. of Radio wave Propagation, Qingdao, China

fYear

2012

fDate

22-26 Oct. 2012

Firstpage

547

Lastpage

550

Abstract

We presented in this paper the ionosphere variation characteristics during solar flares with location, season and solar activity level at Kunming site (25.6°N, 103.8°E), using the data measured by MF radar and ionosonde. Results showed: (1) the maximum amplitudes both D region and f_min during solar flares appeared near at noon; there was no the strict corresponding relationship during solar flares between F layer critical frequency (foF2) and location time. (2) seasonal variation of increasing amplitude of electron density in D layer during solar flares reached the maximum in summer; that of f_min was maximal in autumn, second in spring; that of foF2 reached the maximum in winter, second in autumn and least in spring. (3) the variation of ionosphere showed the positive correlation with the level of solar flare. (4) the ionosphere of D region had different characteristics with F layer ionosphere during solar flare on November 4, 2008.

Keywords

D-region; F-region; electron density; ionospheric disturbances; solar flares; AD 2008 11 04; D layer; D region; F layer critical frequency; F layer ionosphere; Kunming site; MF radar; electron density amplitude; foF2 critical frequency; ionosonde; ionosphere variation characteristics; ionospheric response analysis; solar activity level; solar flares; Correlation; Frequency measurement; Ionization; Ionosphere; Radar; Springs; ionospheric response; seasonal variation; solar flare;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas, Propagation & EM Theory (ISAPE), 2012 10th International Symposium on

Conference_Location

Xian

Print_ISBN

978-1-4673-1799-3

Type

conf

DOI

10.1109/ISAPE.2012.6408829

Filename

6408829