author = "Figueiredo, Cosme Alexandre Oliveira Barros and Wrasse, Cristiano 
                         Max and Takahashi, Hisao and Otsuka, Y. and Shiokawa, K. and 
                         Barros, D.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Nagoya University} and {Nagoya 
                         University} and {Instituto Nacional de Pesquisas Espaciais 
                title = "Large\‐scale traveling ionospheric disturbances observed by 
                         GPS dTEC maps over North and South America on Saint Patrick’s Day 
                         storm in 2015",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2017",
               volume = "122",
               number = "4",
                pages = "4755--4763",
                month = "Apr.",
             keywords = "ionosphere, LSTID, magnetic storm, waves.",
             abstract = "Large-scale traveling ionospheric disturbances (LSTIDs) were 
                         detected in both Northern and Southern Hemispheres over American 
                         sector during the geomagnetic storm on 1718 March 2015, also known 
                         as the Saint Patrick's Day storm. Detrended total electronic 
                         content (dTEC) maps were made using dense GNSS network receiver 
                         data. The retrieved LSTIDs showed wavelengths of 1000 to 2000 km, 
                         phase velocity of ~3001000 m/s, and period of ~3050 min. Among 
                         them, three couples of LSTIDs were observed propagating from the 
                         polar regions to low latitudes. Two wave events observed in 
                         daytime showed the propagation direction of southwest in the 
                         Northern Hemisphere and northeast in the Southern Hemisphere, 
                         which means an asymmetric propagation against the geographic 
                         equator. The other wave event observed during the evening hour 
                         showed symmetric propagation direction, i.e., southwest in the 
                         Northern Hemisphere and northwest in the Southern Hemisphere, 
                         whereas their wavelength and phase velocity are significantly 
                         different between NH and SH. These observations indicate that the 
                         two groups of LSTID have different propagation conditions from 
                         polar to low-latitude regions. The observed asymmetric/symmetric 
                         propagation forms suggest asymmetric/symmetric auroral current 
                         activity between the northern and southern polar regions.",
                  doi = "10.1002/2016JA023417",
                  url = "http://dx.doi.org/10.1002/2016JA023417",
                 issn = "2169-9402",
             language = "en",
           targetfile = "figueiredo_large.pdf",
        urlaccessdate = "03 dez. 2020"