%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3ETL868 8JMKD3MGPCW/3EU29DP
%3 1-s2.0-S0273117799007097-main.pdf
%X In recent years, scientists have used wide-angle imaging observations of F-region nightglow emissions (e.g., OI630 nm and OI777.4 nm) to map the F-region equatorial ionospheric irregularity structures, characterized by large scale plasma depletions, generally known as transequatorial plasma bubbles. In Brazil, an OI630 nm all-sky imaging system has been in operation at Cachoeira Paulista (22.7 degrees S, 45.0 degrees W) since March 1987. This has provided an extensive data-base of the OI630 nm all-sky imaging observations in the equatorial ionospheric anomaly region. In this paper, the morphology of large scale equatorial F-region plasma depletions under sunspot maximum and minimum conditions is presented and discussed. It has been observed that the occurrences of plasma depleted regions are relatively lesser during low solar activity than during high solar activity. The seasonal occurrence pattern is fairly similar for high and low solar activities.
%N 11
%@secondarydate 20011105
%T Solar cycle effects on large scale equatorial F-region plasma depletions
%K AERONOMIA, ciclo solar, efeitos, região F, propagação transequatorial, bolhas de plasma, atividade solar, solar cycle, effects, F region, transequatorial propagation, plasma bubbles, solar activity.
%@secondarytype PRE PI
%@archivingpolicy denypublisher denyfinaldraft24
%@usergroup administrator
%@usergroup jefferson
%@group DAE-INPE-MCT-BR
%@group DGE-INPE-MCT-BR
%@group DAE-INPE-MCT-BR
%@secondarykey INPE-8436-PRE/4204
%F 9393
%@issn 0273-1177
%2 sid.inpe.br/iris@1905/2005/07.29.23.14.12
%B Advances in Space Research
%@versiontype publisher
%P 1477-1480
%4 sid.inpe.br/iris@1905/2005/07.29.23.14
%@documentstage not transferred
%D 1999
%V 24
%A Sahai, Yogeshwar,
%A Fagundes, Paulo Roberto,
%A Bittencourt, José Augusto,
%@dissemination WEBSCI; PORTALCAPES; MGA; COMPENDEX.
%@area CEA