Artículo
Longitudinal variations of ionospheric parameters near totality during the eclipse of December 14, 2020
de Haro Barbás, Blas Federico; Bravo Sepulveda, Manuel Alejandro; Elias, Ana Georgina
; Martínez Ledesma, Miguel; Molina, Maria Graciela
; Urra, B.; Venchiarutti, José Valentín
; Villalobos, C.; Namour, Jorge Habib; Ovalle, Elías M.; Guillermo, Eduardo Daniel; Carrasco, E.; de Pasquale, Lorenzo; Rojo, E.; Leiva, R.
Fecha de publicación:
12/2021
Editorial:
Elsevier
Revista:
Advances in Space Research
ISSN:
0273-1177
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
On December 14, 2020, a total solar eclipse occurred whose shadow cone projected over part of South America. Its effect on critical ionospheric frequencies variability is analysed, considering two stations with similar geographical latitudes and a 95% obscuration percentage: Chillán (36.6°S, 72.0°W), in Chile, and Bahía Blanca (38.9°S, 62.2°W), in Argentina. A comparison of the ionospheric response to the eclipse is made with quiet time daily values and the IRI-2016 model. Results indicate that the greatest eclipse impacts are obtained in foE and foF1, with ∼31% and ∼40% of maximum reductions, respectively. Alternatively, weak disturbances are observed in the foF2 case (<20%). The recombination coefficients were calculated for the E- layer and F1-layer with values of α ∼10−9 cm3 s−1 and for F2-layer with values in β ∼10−4 s−1, similar to previous studies. Longitudinal differences between both ionospheric stations are very small for the F1-layer (∼11%), but a much larger variability is found at F2-layer critical frequencies (∼20%). These results suggest different plasma diffusion processes at high altitudes in the different locations that require further investigation in future studies.
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Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Citación
de Haro Barbás, Blas Federico; Bravo Sepulveda, Manuel Alejandro; Elias, Ana Georgina; Martínez Ledesma, Miguel; Molina, Maria Graciela; et al.; Longitudinal variations of ionospheric parameters near totality during the eclipse of December 14, 2020; Elsevier; Advances in Space Research; 2021; 12-2021; 1-10
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