Conjugated asymmetry of the onset and magnitude of GPS scintillation driven by the vertical plasma drift

Autor(es)

Sousasantos, J. ; Abdu, M. A. ; de Paula, E. R. ; Moraes, A. O. ; Salles, L. A. ; Affonso, B. J.

• Tipo de documento: Artigo Científico
• Fonte: GPS SOLUTIONS; v. 26, n. 3, p. 13-pg., 2022-07-01.

Resumo

The equatorial plasma bubble evolution, its symmetric propagation away from the equator over north/south hemispheres, the vertical plasma drift asymmetry, and some implications between these phenomena are examples of the conjugate point experiment campaign results. However, the asymmetric transport of plasma may imply a distinct ionospheric background in each hemisphere. When the equatorial depletion reaches these regions, the ionospheric scintillation may present different patterns. In this work, data from scintillation monitors, ionosondes, and all-sky imagers deployed at geomagnetically antipodal stations around the equator during the campaign were evaluated along the months of October-December 2002. The results reveal asymmetries in the onset times and scintillation magnitudes. On the one hand, the scintillation onset occurred earlier in 80% of the cases over the southern hemisphere. On the other hand, 71% of the nights verified the larger scintillation values in the northern hemisphere. The distinct F region altitudes, thickness, bottomside electron density gradient scale lengths, and TEC over both stations seem to contribute to this asymmetric behavior. (AU)

• Processo FAPESP: 17/50115-0 - INCT 2014: tecnologia GNSS no suporte à navegação aérea
• Beneficiário: Joao Francisco Galera Monico
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa em Políticas Públicas
• Processo FAPESP: 18/06158-9 - Estudos estatísticos da variação dos parâmetros ionosféricos e sua relação com eventos do clima espacial
• Beneficiário: Jonas de Sousa dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/24970-7 - Programa de Pesquisa de Observação e Previsão da Cintilação (SPORT)
• Beneficiário: Mangalathayil Ali Abdu
• Modalidade de apoio: Auxílio à Pesquisa - Temático