PT Journal AU Pierre Auger Collaboration (Abreu, Pea Pastor, S TI Identifying clouds over the Pierre Auger Observatory using infrared satellite data SO Astroparticle Physics JI Astropart Phys. PY 2013 BP 92 EP 101 VL 50-52 DI 10.1016/j.astropartphys.2013.09.004 LA English DE Ultra-high energy cosmic rays; Pierre Auger Observatory; Extensive air showers; Atmospheric monitoring; Clouds; Satellites AB We 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 km(2) of the Pierre Auger Observatory twice per hour with a spatial resolution of similar to 2.4 km by similar to 5.5 km. Our method could also be applied to monitor cloud cover for other ground-based observatories and for space-based observatories. ER