@InProceedings{CuevaPaulKher:2013:StAnMo,
               author = "Cueva, Ricardo Yvan de La Cruz and Paula, Eurico Rodrigues de and 
                         Kherani, Esfhan Alam",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Statistical analysis and modelling of equatorial spread F 
                         parameters obtained from VHF radar at three longitudinal sectors",
            booktitle = "Proceedings...",
                 year = "2013",
         organization = "International Congress of the Brazilian Geophysical Society and 
                         EXPOGEf, 13.",
                 note = "Setores de Atividade: Outras atividades profissionais, 
                         cient{\'{\i}}ficas e t{\'e}cnicas.",
             keywords = "modelling of spread F parameters, VHF radar plume.",
             abstract = "Equatorial Spread F (ESF) is a manifestation of ionospheric 
                         interchange instabilities in the nighttime equatorial F region. 
                         These instabilities generate plasma density irregularities with 
                         scale sizes ranging from kilometers to thousands of kilometers. In 
                         the present study, statistics of various aspects of spread F 
                         occurrence are presented from HF/VHF radar located at three 
                         equatorial stations: Christmas Island (2o N, 202.6o E, 2.9o N dip 
                         latitude, VHF radar), S{\~a}o Lu{\'{\i}}s (2.59o S, 315.8o E, 
                         0.5o S dip latitude, HF radar) and Jicamarca (12o S, 283.1o E, 
                         0.6o N dip latitude). The spread F parameters presented here are 
                         the onset altitude and onset time (onset refers to first 
                         appearance of signal in the radar field of view) of the 
                         bottom-type and plume, and the peak altitude of the plume which 
                         are known to be associated with the spread F occurrence 
                         characteristics. The study reveals novel features namely, seasonal 
                         and solar flux dependence of spread F occurrence over Christmas 
                         island /S{\~a}o Lu{\'{\i}}s, and longitudinal dependence of 
                         spread F occurrence characteristics from these three stations 
                         based on the chosen parameters. The importance of this work lies 
                         in the spread F parameter empirical model developed combining 
                         statistical analysis of three equatorial and longitudinally 
                         separated stations, which is important to study evolution of 
                         irregularities in different longitudinal sectors for space weather 
                         forecasting and nowcasting programs, and improving scintillation 
                         warning models. These parameters show generally linear correlation 
                         with solar flux index (F10.7 cm) and variation with season and 
                         magnetic declination angle. The fit correlation with F10.7cm is 
                         shown as useful information to implement one spread-F development 
                         empirical model based on small scale irregularities detected by 
                         VHF radars.",
  conference-location = "Rio de Janeiro",
      conference-year = "2013",
                label = "lattes: 5569424161133651 1 CuevaPaulKher:2013:StAnMo",
             language = "en",
                  url = "http://sys2.sbgf.org.br/congresso/abstracts/trabalhos/sbgf_4231.pdf",
        urlaccessdate = "04 maio 2024"
}