author = "Souza, Jonas Rodrigues de and Batista, Inez Staciarini and Aquino, 
                         Maria G. S. and Arruda, Daniela Cristina Santana",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "A simple data assimilation criterion to be used by a physical 
                 year = "2017",
         organization = "International Congress of the Brazilian Geophysical Sociey, 15.",
             abstract = "In this work, we use the vertical total electron content (TEC) 
                         obtained from Boston College South American data chain. The data 
                         are only for the day March 24, 2015. Three latitudinal ranges 
                         covering -30 to 30 degrees, which are distributed along the 
                         magnetic meridian crossing Jicamarca (Geog. Longitude: -77), Boa 
                         Vista-Campo Grande (Geog. Longitude: -57) and S{\~a}o 
                         Lu{\'{\i}}s (Geog. Longitude: -44), respectively. Our 
                         assimilation data criterion consist of a latitudinal adjustment of 
                         the electron density calculated by the Sheffield University 
                         Plasmasphere Ionosphere Model at INPE (SUPIM-INPE) applying the 
                         same proportion as obtained from the ratio between the observed 
                         TEC and calculated by SUPIM-INPE. F-region critical frequency 
                         (foF2) and TEC registered by Digisondes operating at Boa Vista, 
                         S{\~a}o Lu{\'{\i}}s and Campo Grande were also used in the 
                         result validations. In general, Boston College TECs show good 
                         agreement with those obtained from Digisondes for all locations, 
                         except over S{\~a}o Lu{\'{\i}}s near 00 and 12 UT and over 
                         Campo Grande after 14 UT. The direct results from SUPIM-INPE for 
                         both foF2 and TEC have not shown good agreement with the 
                         observational data. On the other hand, it was found excellent 
                         results, mainly for TEC, after applying the data assimilation. The 
                         proportion criterion is underestimating the values of foF2 between 
                         evening and sunrise. SUPIM-INPE model seems to be overestimating 
                         the electron density decay for altitude above F-region peak, 
                         causing low ratio in observed/calculated TEC values and, 
                         consequently, low foF2.",
  conference-location = "Rio de Janeiro, RJ",
      conference-year = "31 jul. - 03 ago.",
             language = "en",
           targetfile = "souza_simple.pdf",
        urlaccessdate = "04 dez. 2020"