Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009

The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization...

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Detalles Bibliográficos
Autores principales: Abreu, Alessandro José de, Malmonge Martin, Inácio, Jesus, Rodolfo de, Alves Bolzan, Maurício José, Venkatesh, Kavutarapu, Fagundes, Paulo Roberto, Alves, Mauro Angelo, Gende, Mauricio, Kumar, Sanjay
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
Física
GPS-TEC
Ionosphere
IRI model
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87458
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87458
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Física
GPS-TEC
Ionosphere
IRI model
spellingShingle Ciencias Astronómicas
Física
GPS-TEC
Ionosphere
IRI model
Abreu, Alessandro José de
Malmonge Martin, Inácio
Jesus, Rodolfo de
Alves Bolzan, Maurício José
Venkatesh, Kavutarapu
Fagundes, Paulo Roberto
Alves, Mauro Angelo
Gende, Mauricio
Kumar, Sanjay
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
topic_facet Ciencias Astronómicas
Física
GPS-TEC
Ionosphere
IRI model
description The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization anomaly (EIA), in the Brazilian sector are used in this paper. TEC from the latest available IRI-2012 model at the same locations is also used. A comparative study between GPS-TEC and the IRI-2012 model is analyzed during the deep low solar activity period of 2009 in the unusual solar cycle 23. The measurements and the modeled data show that the IRI-TEC model gives the better estimates of the GPS-TEC during the nighttime from January to December months at PAL and SJC. The IRI-TEC model shows larger differences from the GPS-TEC in the afternoon hours, mainly at SJC. These discrepancies observed at SJC in the afternoon hours for all months are possibly due to the dynamics of EIA in consequence of the equatorial fountain effect. At PAL and SJC, oscillations of GPS-TEC with periods around 16 days in April and periods around 27-32 days between September and December possibly are noticed which could be related to a modulation of the semidiurnal tide and Sun’s rotation, respectively. Also, oscillations with periods around 2-4 and 5-10 days from January to December are observed at PAL and SJC, possibly associated with the propagation of planetary waves.
format Articulo
Articulo
author Abreu, Alessandro José de
Malmonge Martin, Inácio
Jesus, Rodolfo de
Alves Bolzan, Maurício José
Venkatesh, Kavutarapu
Fagundes, Paulo Roberto
Alves, Mauro Angelo
Gende, Mauricio
Kumar, Sanjay
author_facet Abreu, Alessandro José de
Malmonge Martin, Inácio
Jesus, Rodolfo de
Alves Bolzan, Maurício José
Venkatesh, Kavutarapu
Fagundes, Paulo Roberto
Alves, Mauro Angelo
Gende, Mauricio
Kumar, Sanjay
author_sort Abreu, Alessandro José de
title Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
title_short Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
title_full Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
title_fullStr Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
title_full_unstemmed Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
title_sort comparison of gps-tec measurements with iri2012-tec predictions in the brazilian sector during the unusual solar minimum 2009
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87458
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