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International Commission on Illumination

国际照明委员会(CIE)是由国际照明工程领域中光源制造、照明设计和光辐射计量测试机构组成的非政府间多学科的世界性学术组织，是技术、科学、文化方面的非营利性组织。其前身是1900年成立的国际光度委员会(Intemational Photometric Commission：IPC)，1913年改为现名。总部设在奥地利维也纳。在光和照明的科学、技术和工艺领域提供国际论坛，并在成员国之间开展促进照明工程学研究的合作与交流；制定光和照明领域的基本标准和计量规程；在制定光和照明领域的国际和国家标准中提供原则和规程的应用方目的指南；在与光和照明领域的科学、技术和工艺有关的所有事项方面制定和发布标准、报告和其他出版物。从1999年以来，通信的光学、视学和计量方面、影像的制作和重放、使用所有类型的模拟和数字成像装置、存储媒体和成像媒体，也都在CIE的工作领域内。中国照明协会、香港照明协会为CIE成员。

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Spatial Distribution of Daylight - CIE Standard General Sky
Joint ISO/CIE Standard
ISO 15469:2004 (E) / CIE S 011/E:2003

CIE has published the standard "CIE S003 Spatial distribution of daylight - CIE standard overcast sky and clear sky" in 1996. Since then further types of skies were examined and an international consensus was reached on their luminance distribution and standardization.

The luminance distribution of the sky depends on weather and climate, and it changes during the course of a day with the position of the sun. This standard lists a set of luminance distributions, which model the sky under a wide range of conditions, from the heavily overcast sky to cloudless weather. It is intended for two purposes:

i. to be a universal basis for the classification of measured sky luminance distributions

ii. to give a method for calculating sky luminance in daylighting design procedures.

This Standard defines relative luminance distributions: the luminance of the sky at any point is given as a function of the zenith luminance. For daylighting calculation purposes it may be used with values of zenith luminance or of horizontal illuminance to obtain absolute luminance distributions.

This Standard incorporates both the CIE Standard Clear Sky and the CIE Standard Overcast Sky, which are treated as particular cases of the General Sky. The Overcast Sky is retained as a separate formula because there are many calculation procedures that embody the mathematical formulation of this particular distribution.

This present Standard replaces CIE S003 - 1996 "Spatial distribution of daylight - CIE standard overcast sky and clear sky" and ISO 15469:1997.

This standard has been approved by CIE and by ISO. It may be obtained from the CIE National Committees or the Central Bureau of the CIE.

我是帮别人找的，说实话，我也不知道是不是这个。楼上的朋友可否把全文发给我,E-Mail:diamond56@citiz.net。不管最终是否是，我都会赠与积分以示谢意。谢谢。

http://www.cie.co.at/
国际照明委员会的网址
上面有一项是publications
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