| Texto completo | |
| Autor(es): |
Moraes, Alison
[1]
;
Sousasantos, Jonas
[2]
;
de Paula, Eurico Rodrigues
[3]
;
Popov Pereira da Cunha, Josue Jurgen
[4]
;
Lima Filho, Vicente Carvalho
[2]
;
Vani, Bruno Cesar
[5]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] IAE, BR-12228904 Sao Jose Dos Campos, SP - Brazil
[2] ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[3] INPE, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[4] McKinsey & Co Inc, BR-04717004 Sao Paulo, SP - Brazil
[5] Inst Fed Educ Ciencia & Tecnol Sao Paulo IFSP PEP, BR-19470000 Presidente Epitacio, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF SPACE WEATHER AND SPACE CLIMATE; v. 9, MAY 17 2019. |
| Citações Web of Science: | 1 |
| Resumo | |
The present work aims to evaluate the application of the kappa-mu distribution as a representation of the fading effect caused by the phenomenon of scintillation on L-band transionospheric radio links. The ionospheric scintillation is a phenomenon defined as a rapid variation in the amplitude and phase of electromagnetic wave signals. This phenomenon starts in the first hours of the night, at latitudes near the geomagnetic equator. Scintillation occurs when radio signals cross ionospheric irregularities, also known as plasma bubbles. These plasma bubble structures are generated after the sunset due to instabilities in the F region of ionosphere. Distributions with non-single parameter usually present better results, however, this point requires further investigation by comparing different models. The goals of this study are: (1) the modeling of experimental data using the kappa-mu distribution; (2) the kappa-mu parameters characterization for empirical data and the evaluation of parameters estimation based in different approaches; (3) the comparison between the distribution proposed and other models adopted in the literature in order to verify the performance of two parameter models. The results of the analysis performed showed that the kappa-mu distribution presents good fitting of the empirical scintillation data. These fitting results were calculated through the chi-square fit test under which the values reveal fair E{[}chi(2)] for kappa-mu distribution in most of the cases. The evaluation of kappa-mu parameters suggests that the distribution has a more conservative outcome than in the distributions traditionally used, but being a legitimate approximation due to its adjustable features in the tail region of the distribution. Typical pairs of kappa-mu coefficients are presented for theoretical works. The comparison of kappa-mu distribution to Rice, Nakagami-m and alpha-mu models showed that kappa-mu is capable of describing more severe scintillation scenarios where the tail of the distribution is more raised in comparison to the other models. (AU) | |
| 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 |