RT info:eu-repo/semantics/article T1 Assessment of Sun photometer Langley calibration at the high-elevation sites Mauna Loa and Izaña A1 Toledano Olmeda, Carlos A1 González, Ramiro A1 Fuertes, David A1 Cuevas, Emilio A1 Eck, Thomas F. A1 Kazadzis, Stelios A1 Kouremeti, Natalia A1 Gröbner, Julian A1 Goloub, Philippe A1 Blarel, Luc A1 Román, Roberto A1 Barreto, África A1 Berjón, Alberto A1 Holben, Brent N. A1 Cachorro Revilla, Victoria Eugenia AB Most of the ground-based radiometric networks have their reference instruments and/or calibrate them at Mauna Loa or Izaña. The suitability of these high-mountain stations for absolute radiometric calibrations is investigated with the support of 20 years of first-class Sun photometer data from the AERONET and GAW-PFR networks. We analyze the number of calibration days at each site in a climatological sense and investigate the uncertainty of the calibrations based on long-term statistics. YR 2018 FD 2018 LK https://uvadoc.uva.es/handle/10324/65472 UL https://uvadoc.uva.es/handle/10324/65472 LA eng NO Atmos. Chem. Phys., 18, 14555–14567, 2018. DS UVaDOC RD 24-nov-2024