@InProceedings{SouzaBatiAquiArru:2017:SiDaAs,
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
model",
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 -30º to 30º degrees, which are distributed along the
magnetic meridian crossing Jicamarca (Geog. Longitude: -77º), Boa
Vista-Campo Grande (Geog. Longitude: -57º) and S{\~a}o
Lu{\'{\i}}s (Geog. Longitude: -44º), 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 = "27 abr. 2024"
}