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Area Lighting / Lighting technology and daylighting

IEV ref 845-29-112

en
CIE standard clear sky
cloudless sky for which the relative luminance distribution is given by the luminance gradation function, φ(Z), which relates the luminance of a sky element to its zenith angle, Z:

φ(Z)=1 e 0,32 cosZ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abeA8aQjaacIcacaWGAbGaaiykaiabg2da9iaaigdacqGHsislcaWG LbWaaWbaaSqabeaadaWcbaadbaGaeyOeI0IaaGimaiaacYcacaaIZa GaaGOmaaqaaiGacogacaGGVbGaai4CaiaadQfaaaaaaaaa@4672@ if 0Z< π 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aabcdacqGHKjYOcaWGAbGaaeipamaalaaabaacdaGae8hWdahabaGa aGOmaaaaaaa@3DAE@ , and φ(Z)=1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abeA8aQjaacIcacaWGAbGaaiykaiabg2da9iaaigdaaaa@3CCF@ if Z= π 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadQfacaqG9aWaaSaaaeaaimaacqWFapaCaeaacaaIYaaaaaaa@3B47@ (at the horizon)

Note 1 to entry: For additional information, see ISO 15469/CIE S 011, Spatial distribution of daylight – CIE standard general sky.

Note 2 to entry: This entry was numbered 845-09-91 in IEC 60050-845:1987.


fr
ciel serein normalisé CIE, m
ciel sans nuage dont la distribution relative de luminance est donnée par la fonction de gradation de luminance φ(Z), qui associe la luminance d'un élément de ciel à son angle zénithal, Z:

φ(Z)=1 e 0,32 cosZ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abeA8aQjaacIcacaWGAbGaaiykaiabg2da9iaaigdacqGHsislcaWG LbWaaWbaaSqabeaadaWcbaadbaGaeyOeI0IaaGimaiaacYcacaaIZa GaaGOmaaqaaiGacogacaGGVbGaai4CaiaadQfaaaaaaaaa@4672@ si 0Z< π 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aabcdacqGHKjYOcaWGAbGaaeipamaalaaabaacdaGae8hWdahabaGa aGOmaaaaaaa@3DAE@ , et φ(Z)=1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abeA8aQjaacIcacaWGAbGaaiykaiabg2da9iaaigdaaaa@3CCF@ si Z= π 2 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadQfacaqG9aWaaSaaaeaaimaacqWFapaCaeaacaaIYaaaaaaa@3B47@ (au niveau de l'horizon)

Note 1 à l'article: Pour des informations complémentaires, voir l'ISO 15469/CIE S 011, Répartition spatiale de la lumière du jour – Ciel général normalisé CIE.

Note 2 à l'article: Cet article était numéroté 845-09-91 dans l'IEC 60050-845:1987.


ar
السماء الصافية طبقا للمواصفة القياسية للجنة الإنارة الدولية

de
genormter klarer Himmel nach CIE, m

it
cielo sereno secondo CIE

ko
시아이이 표준 청명 하늘

ja
CIE 標準晴天空

pl
nieboskłon bezchmurny znormalizowany CIE, m

pt
céu limpo normalizado CIE

zh
CIE标准晴天

Publication date: 2020-12
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