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Ground illumination from a turbid cloudless sky.

Authors
  • Nagel, M R
Type
Published Article
Journal
Applied optics
Publication Date
Jan 01, 1975
Volume
14
Issue
1
Pages
67–75
Identifiers
DOI: 10.1364/AO.14.000067
PMID: 20134833
Source
Medline
License
Unknown

Abstract

An attempt is made to develop a set of empirical equations for the relationship between skylight illuminance, turbidity, and solar altitude under the condition of a cloud free sky. The maximum possible illuminance from a cloud-free sky is estimated using these equations. The illuminances are stated in relation to the illuminance produced by a Rayleigh sky. An improved approximation for Bemporad's airmass function is used in the computations.

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