Calibration of the logarithmic-periodic dipole antenna (LPDA) radio stations at the Pierre Auger Observatory using an octocopter - Aab, A.; Albuquerque, Ivone Freire da Mota e; Souza, Vitor de; Gouffon, Philippe; Kemmerich, N.; Prado, R. R.; Carvalho, W. Rodrigues de; Santos, Edivaldo Moura; Peixoto, Carlos Jose Todero (Journal of Instrumentation, 2017)