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@Article{SahaiJFSATAPALB:2012:EfObEq,
               author = "Sahai, Y. and Jesus, R. and Fagundes, P. R. and Selhorst, C. L. 
                         and Abreu, A. J. and Tulasi Ram, S. and Aragon-Angel, A. and 
                         Pillat, V. G. and Abalde, J. R. and Lima, W. L. C. and 
                         Bittencourt, J. A.",
          affiliation = "Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy, 
                         Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos, 
                         SP, Brazil and Universidade Do Vale Do Paraiba (UNIVAP), Physics 
                         and Astronomy, Av Shishima Hifumi 2911, 12244-000 S{\~a}o 
                         Jos{\'e} dos Campos, SP, Brazil and Universidade Do Vale Do 
                         Paraiba (UNIVAP), Physics and Astronomy, Av Shishima Hifumi 2911, 
                         12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and 
                         Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy, 
                         Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos, 
                         SP, Brazil and Universidade Do Vale Do Paraiba (UNIVAP), Physics 
                         and Astronomy, Av Shishima Hifumi 2911, 12244-000 S{\~a}o 
                         Jos{\'e} dos Campos, SP, Brazil and Institute of Astronomy and 
                         Astrophysics, Academia Sinica, Taipei, Taiwan and Departmento Do 
                         Mathematica Aplicada, Universitat Polit{\`e}cnica de Catalunya 
                         (UPC), Barcelona, Spain and Universidade Do Vale Do Paraiba 
                         (UNIVAP), Physics and Astronomy, Av Shishima Hifumi 2911, 
                         12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and 
                         Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy, 
                         Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos, 
                         SP, Brazil and Centro Univ Luterano de Palmas (CEULP), 
                         Universidade Luterano Do Brazil (ULBRA), Palmas, TO, Brazil and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Effects observed in the equatorial and low latitude ionospheric 
                         F-region in the Brazilian sector during low solar activity 
                         geomagnetic storms and comparison with the COSMIC measurements",
              journal = "Advances in Space Research",
                 year = "2012",
               volume = "50",
               number = "10",
                pages = "1344--1351",
                month = "Nov.",
             keywords = "COSMIC satellite, F-region, Geomagnetic storm, Ionosphere, Low 
                         solar activityCorrelation coefficient, Equatorial spread F, 
                         FORMOSAT-3/COSMIC, Geomagnetic storm, Ground based, Ionospheric 
                         parameters, Low latitudes, Magnetic equator, Peak height, Radio 
                         occultations, Solar activity, Space-borne.",
             abstract = "The main objective of the present investigation has been to 
                         compare the ionospheric parameters (NmF2 and hmF2) observed by two 
                         ground-based ionospheric sounders (one at PALMAS- located near the 
                         magnetic equator and the other at Sao Jose dos Campos-located in 
                         the low-latitude region) in the Brazilian sector with that by the 
                         satellite FORMOSAT-3/COSMIC radio occultation (RO) measurements 
                         during two geomagnetic storms which occurred in December 2006 and 
                         July 2009 It should be pointed out that in spite of increasing the 
                         latitude (to 10) and longitude (to 20) around the stations; we 
                         had very few common observations It has been observed that both 
                         the peak electron density (NmF2) and peak height (hmF2) observed 
                         by two different techniques (space-borne COSMIC and ground-based 
                         ionosondes) during both the geomagnetic storm events compares 
                         fairly well (with high correlation coefficients) at the two 
                         stations in the Brazilian sector It should be pointed out that due 
                         to equatorial spread F (ESF) in the first storm (December 2006) 
                         and no-reflections from the ionosphere during nighttime in the 
                         second storm (July 2009), we had virtually daytime data from the 
                         two ionosondes.",
                  doi = "10.1016/j.asr.2012.07.006",
                  url = "http://dx.doi.org/10.1016/j.asr.2012.07.006",
                 issn = "0273-1177",
             language = "en",
        urlaccessdate = "26 jan. 2021"
}


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