Análise e Verificação Empírica de Modelos de Predição para Comunicação em HF em Regiões de Baixa Latitude

Several prediction models and digital signal processing techniques have been developed for HF communication, especially the ALE technique, but there is still no standardized method for determining frequencies. In addition, there is a need to ascertain the impact on HF links of peculiar disturbances that happen in the ionosphere in Brazilian territory, such as the Equatorial Spread F (ESF). In this work, it was identified which prediction model best adapts to the Brazilian soil under certain conditions. The times of occurrence of the ESF and its impact on the degradation of the SNR of links in HF were also evaluated.