Seasonal and solar cycle dependence of F3-layer near the southern crest of the equatorial ionospheric anomaly

被引：20

作者：

Fagundes, P. R. ^{[1
]}

Klausner, V. ^{[2
]}

Bittencourt, J. A. ^{[3
]}

Sahai, Y. ^{[1
]}

Abalde, J. R. ^{[1
]}

机构：

[1] UNIVAP, BR-12244000 Sao Jose Dos Campos, SP, Brazil

[2] ON, BR-20921400 Rio De Janeiro, Brazil

[3] INPE, BR-12227010 Sao Jose Dos Campos, SP, Brazil

来源：

ADVANCES IN SPACE RESEARCH | 2011年 / 48卷 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

F3; layer; Low latitude ionosphere; Solar cycle; ADDITIONAL LAYER; F3; LAYER; PLASMA FOUNTAIN; FORTALEZA; STRATIFICATION; REGION; BRAZIL;

D O I：

10.1016/j.asr.2011.04.003

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The occurrence of an additional F3-layer has been reported at Brazilian, Indian and Asian sectors by several investigators. In this paper, we report for the first time the seasonal variations of F3-layer carried out near the southern crest of the equatorial ionospheric anomaly (EIA) at Sao Jose dos Campos (23.2 degrees S, 45.0 degrees W; dip latitude 17.6 degrees S - Brazil) as a function of solar cycle. The period from September 2000 to August 2001 is used as representative of high solar activity (HSA) and the period from January 2006 to December 2006 as representative of low solar activity (LSA). This investigation shows that during HSA there is a maximum occurrence of F3-layer during summer time and a minimum during winter time. However, during LSA, there is no seasonal variation in the F3-layer occurrence. Also, the frequency of occurrence of the F3-layer during HSA is 11 times more than during LSA. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：472 / 477

页数：6

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