%0 Journal Article %@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S} %@nexthigherunit 8JMKD3MGPCW/3ETL868 %X In this paper, we have investigated the responses of the ionospheric F region at equatorial and low latitude regions in the Brazilian sector during the super geomagnetic storm on 15-16 May 2005. The geomagnetic storm reached a minimum Dst of -263 nT at 0900 UT on 15 May. In this paper, we present vertical total electron content (vTEC) and phase fluctuations (in TECU/min) from Global Positioning System (GPS) observations obtained at Belem, Brasilia, Presidente Prudente, and Porto Alegre, Brazil, during the period 14-17 May 2005. Also, we present ionospheric parameters h'F, hpF2, and foF2, using the Canadian Advanced Digital Ionosonde (CADI) obtained at Palmas and Sao Jose dos Campos, Brazil, for the same period. The super geomagnetic storm has fast decrease in the Dst index soon after SSC at 0239 UT on 15 May. It is a good possibility of prompt penetration of electric field of magnetospheric origin resulting in uplifting of the F region. The vTEC observations show a trough at BELE and a crest above UEPP, soon after SSC, indicating strengthening of nighttime equatorial anomaly. During the daytime on 15 and 16 May, in the recovery phase, the variations in foF2 at SJC and the vTEC observations, particularly at BRAZ, UEPP, and POAL, show large positive ionospheric storm. There is ESF on the all nights at PAL, in the post-midnight (UT) sector, and phase fluctuations only on the night of 14-15 May at BRAZ, after the SSC. No phase fluctuations are observed at the equatorial station BELE and low latitude stations (BRAZ, UEPP, and POAL) at all other times. This indicates that the plasma bubbles are generated and confined on this magnetically disturbed night only up to the low magnetic latitude and drifted possibly to west. %8 Oct %N 7 %T An investigation of ionospheric F region response in the Brazilian sector to the super geomagnetic storm of May 2005 %@electronicmailaddress abreu.alessandro@gmail.com %@electronicmailaddress sahai@univap.br %@electronicmailaddress fagundes@univap.br %@electronicmailaddress jesus.rodolfo@hotmail.com %@electronicmailaddress jabittencourt@hotmail.com %@electronicmailaddress valdirgp@univap.br %@secondarytype PRE PI %K Geomagnetic storm, Ionosphere, Equatorial ionospheric irregularities. %@archivingpolicy denypublisher denyfinaldraft24 %@usergroup administrator %@usergroup lattes %@usergroup secretaria.cpa@dir.inpe.br %@usergroup tereza@sid.inpe.br %@group %@group %@group %@group %@group DAE-CEA-INPE-MCT-BR %@e-mailaddress valdirgp@univap.br %3 Abreu-AdvSpaceRes-v48-n7-p1211-1220-science[1].pdf %@secondarymark B4_ASTRONOMIA_/_FÍSICA B3_CIÊNCIAS_BIOLÓGICAS_I B1_ENGENHARIAS_III B1_ENGENHARIAS_IV B1_GEOCIÊNCIAS B1_INTERDISCIPLINAR %F lattes: 1106857072073407 6 AbreuSaFaJeBiPi:2011:AnInOf %@issn 0273-1177 %2 dpi.inpe.br/plutao/2011/09.22.18.53.24 %@affiliation %@affiliation Departamento de Física e Astronomia, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, 2911, São José dos Campos, São Paulo, Brazil %@affiliation Departamento de Física e Astronomia, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, 2911, São José dos Campos, São Paulo, Brazil %@affiliation Departamento de Física e Astronomia, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, 2911, São José dos Campos, São Paulo, Brazil %@affiliation Instituto Nacional de Pesquisas Espaciais (INPE) %@affiliation Departamento de Física e Astronomia, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, 2911, São José dos Campos, São Paulo, Brazil %B Advances in Space Research %@versiontype publisher %P 1211-1220 %4 dpi.inpe.br/plutao/2011/09.22.18.53.23 %@documentstage not transferred %D 2011 %V 48 %@doi 10.1016/j.asr.2011.05.036 %A Abreu, A. J., %A Sahai, Y., %A Fagundes, P. R., %A Jesus, R., %A Bittencourt, J. A., %A Pillat, Valdir Gil, %@dissemination WEBSCI; PORTALCAPES; MGA; COMPENDEX. %@area FISMAT