Altitude distribution of electron concentration in ionospheric D-region in presence of time-varying solar radiation flux

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:279

Article; Proceedings Paper

Nina, A.¹  Cadez, V.²  Sreckovic, V.¹  Sulic, D.³ 

[1] Univ Belgrade, Inst Phys, Belgrade, Serbia

[2] Astron Observ, Belgrade 11060, Serbia

[3] Union Nikola Tesla Univ, Fac Ecol & Environm Protect, Belgrade 11000, Serbia

关键词: Electron concentration;    Photo-ionization;    Recombination;    Solar flare;    Ionosphere;   

DOI  :  10.1016/j.nimb.2011.10.019

来源: Elsevier

【 摘 要 】

In this paper, we study the influence of solar flares on electron concentration in the terrestrial ionospheric D-region by analyzing the amplitude and phase time variations of very low frequency (VLF) radio waves emitted by DHO transmitter (Germany) and recorded by the AWESOME receiver in Belgrade (Serbia) in real time. The rise of photo-ionization rate in the ionospheric D-region is a typical consequence of solar flare activity as recorded by GOES-15 satellite for the event on March 24, 2011 between 12:01 UT and 12:11 UT. At altitudes around 70 km, the photo-ionization and recombination are the dominant electron gain and electron loss processes, respectively. We analyze the relative contribution of each of these two processes in the resulting electron concentration variation in perturbed ionosphere. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free