RAPACE Sky Imager - P2OA-CRA station - ELIFAN Cloud Fraction - Hourly means - L2A

Time series of cloud fraction deduced from the Sky Imager of the Centre de Recherche Atmospheriques de Lannemezan (65) station, platform of P2OA. Two estimates are given: one obtained with an absolute threshold ot R/B ratio, and the other from a differential threshold ot R/B ratio relatively to a clear sky library. This dataset corresponds to hourly averages.