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

Autor(es)

Fagundes, P. R. ^[1] ; Klausner, V. ^[2] ; Bittencourt, J. A. ^[3] ; Sahai, Y. ^[1] ; Abalde, J. R. ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Advances in Space Research; v. 48, n. 3, p. 472-477, AUG 3 2011.
• Citações Web of Science: 15

Resumo

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. (AU)

• Processo FAPESP: 08/05482-5 - Estudo da geração, evolução e dinâmica das irregularidades ionosféricas na região equatorial e baixas latitudes
• Beneficiário: Paulo Roberto Fagundes
• Modalidade de apoio: Auxílio à Pesquisa - Regular