author = "Marini Pereira, Leonardo and Oliveira, Kelias de and Salles, Lucas 
                         A. and Moraes, Alison de O. and Paula, Eurico Rodrigues de and 
                         Muella, Marcio Tadeu de Assis Honorato and Perrella, Waldecir J.",
          affiliation = "{Institute of Airspace Control (ICEA)} and {Instituto Federal de 
                         Goi{\'a}s (IFG)} and {Instituto Tecnol{\'o}gico de 
                         Aeron{\'a}utica (ITA)} and {Instituto Tecnol{\'o}gico de 
                         Aeron{\'a}utica (ITA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade do Vale do Para{\'{\i}}ba 
                         (UNIVAP)} and {Instituto Tecnol{\'o}gico de Aeron{\'a}utica 
                title = "On the field validation of a-l fading coefficients estimator based 
                         on the autocorrelation function for ionospheric amplitude 
              journal = "Advances in Space Research",
                 year = "2019",
               volume = "64",
               number = "10",
                pages = "2176--2187",
                month = "Nov.",
             keywords = "Ionospheric scintillation, Fading distribution, GNSS availability, 
                         Augmentation systems.",
             abstract = "The ionosphere in low-latitude regions has intense dynamics with 
                         great variability - not only spatially but also temporally. The 
                         most critical effect found in the low-latitude region is the 
                         scintillation in phase and amplitude due to plasma bubble 
                         occurrence in the ionospheric layer. To augmentation systems like 
                         GBAS or SBAS, designed to provide Category-I (CAT I) precision 
                         approach service in low-visibility conditions, plasma bubbles can 
                         compromise the performance requirements for air navigation 
                         precision approach in a way that the service provided by the 
                         system is considered unviable. In practical terms, this is the 
                         main reason why the Brazilian Department of Airspace Control 
                         (DECEA) still has not implemented any augmentation system in 
                         Brazil. Scintillation may lead to loss of signal lock of the 
                         affected satellite. In this context, a better understanding of the 
                         scintillation pattern and its statistical properties gain 
                         particular relevance, once this is the most concerning issue for 
                         the performance of any GNSS receiver in low-latitude regions 
                         especially in the context of augmentation systems for air 
                         navigation. Previous works validated the use of the alpha-mu 
                         distribution to characterize amplitude scintillation. The present 
                         work is concerned with proposing a new method for the estimation 
                         of the alpha-mu coefficients based on the alpha-mu, 
                         autocorrelation function. The method is validated using field data 
                         and comparing the results from empirical autocorrelation function 
                         with the results obtained from the moment-based estimator. 
                         Additionally, the efficiency of the method is proven by analyzing 
                         measurements of Level-Crossing Rate (LCR) and Average Fading 
                         Duration (AFD) with their respective theoretical formulation. (.",
                  doi = "10.1016/j.asr.2019.06.012",
                  url = "http://dx.doi.org/10.1016/j.asr.2019.06.012",
                 issn = "0273-1177 and 1879-1948",
             language = "en",
           targetfile = "marini_field.pdf",
        urlaccessdate = "17 abr. 2021"