Mise en œuvre et validation d'une méthode opérationnelle et automatique pour l'évaluation d'atlas solaires en Europe à l'aide de mesures satellitaires Meteosat (années 1983, 1984 et 1985)

Abstract : We have set up the existing method of Cano (1982) to assess the global solar radiation using images acquired by the Meteosat satellite. The method is validated against approximately 1800 ground measurements taken during 11 months in 1983, 11 months in 1984 and 7 months in 1985. The major points of this method are 1) the construction of a map of planetary albedo in clear skies, 2) the estimation of a cloud index, n, denoting the percentage of cloud coverage within a pixel relatively to the albedo reference map, 3) the assessment of the relationship between the hourly atmospheric transmittance (K), defined as the ratio between the gloabl radiation and the radiation at the top of the atmosphere (G0h), and the cloud index n. The relationship has a form : K = -a n + b or Gh / G0h = -a n + b, where a and b > 0. Coefficients a and b are computed using measurements performed in the Meteo-France network (Gh) and images acquired in the visible channel of Meteosat (n). We conclude that the method is satisfactory. Existing atlases may be refined or completed (oceans) and unknown or poorly known micro-climates (accuracy 5 km) are evidenced. Accuracy in assessing the monthly means of hourly irradiation is 0,1 kWh/m2. The method is simple enough to be used in several applications relating to solar energy.
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Nathalie Michaud-Regas. Mise en œuvre et validation d'une méthode opérationnelle et automatique pour l'évaluation d'atlas solaires en Europe à l'aide de mesures satellitaires Meteosat (années 1983, 1984 et 1985). Océan, Atmosphère. Université Paris-Diderot - Paris VII, 1986. Français. ⟨pastel-00956605⟩

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