Abreu, P.Aglietta, M.Ahlers, M.Ahn, E.Albuquerque, I.Allekotte, I.Allen, J.Allison, P.Almela, A.Alvarez Castillo, J.Alvarez-Muñiz, J.Alves Batista, R.Ambrosio, M.Aminaei, A.Anchordoqui, L.Andringa, S.Antičić, T.Aramo, C.Arqueros, F.Asorey, H.et al.2014-12-222014-12-222013Astroparticle Physics, 2013; 50-52:92-1010927-65051873-2852http://hdl.handle.net/2440/88389We describe a new method of identifying night-time clouds over the Pierre Auger Observatory using infrared data from the Imager instruments on the GOES-12 and GOES-13 satellites. We compare cloud identifications resulting from our method to those obtained by the Central Laser Facility of the Auger Observatory. Using our new method we can now develop cloud probability maps for the 3000 km² of the Pierre Auger Observatory twice per hour with a spatial resolution of ∼2.4 km by ∼5.5 km. Our method could also be applied to monitor cloud cover for other ground-based observatories and for space-based observatories. © 2013 Elsevier B.V. All rights reserved.en© 2013 Elsevier B.V. All rights reserved.Ultra-high energy cosmic rays; Pierre Auger Observatory; Extensive air showers; Atmospheric monitoring; Clouds; SatellitesJournal article002013349810.1016/j.astropartphys.2013.09.0040003292710000112-s2.0-8488794506017056