Abstract

Measurements have been made of the spectral energy distribution of daylight (sunlight plus skylight) and skylight in the near-ultraviolet and the visible regions of the spectrum as a function of solar altitude for various atmospheric conditions as measured on planes of different orientations.

© 1964 Optical Society of America

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Corrections

H. R. Condit and F. Grum, "Errata: The Spectral Energy Distribution of Daylight.," J. Opt. Soc. Am. 54, 1289-1289 (1964)
https://www.osapublishing.org/josa/abstract.cfm?uri=josa-54-10-1289

References

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  1. A. H. Taylor and G. P. Kerr, J. Opt. Soc. Am. 31, 3 (1941).
    [Crossref]
  2. Sensitometry Exposure of Daylight-Type Color Films, American Standards Association PH2.11 (1958).
  3. S. T. Henderson and D. Hodgkiss, Brit. J. Appl. Phys. 14, 125 (1963).
    [Crossref]
  4. F. Grum, Appl. Opt. 2, 237 (1963).
    [Crossref]
  5. J. Chapman, Technical Note WCLF 53–51 (1953), Photo Reconnaissance Laboratory, Wright Air Development Center, Air Research and Development Command, U. S. Air Force, Wright–Patterson Air Force Base, Ohio.
  6. J. L. Simonds, J. Opt. Soc. Am. 53, 968 (1963).
    [Crossref]
  7. D. L. MacAdam, J. Opt. Soc. Am. 27, 294 (1937).
    [Crossref]
  8. Brussels Session of the International Commission on Illumination, J. Opt. Soc. Am. 50, 89 (1960).
  9. The trace is the total variance of the energy data over all wavelengths.

1963 (3)

1960 (1)

1941 (1)

1937 (1)

Chapman, J.

J. Chapman, Technical Note WCLF 53–51 (1953), Photo Reconnaissance Laboratory, Wright Air Development Center, Air Research and Development Command, U. S. Air Force, Wright–Patterson Air Force Base, Ohio.

Grum, F.

Henderson, S. T.

S. T. Henderson and D. Hodgkiss, Brit. J. Appl. Phys. 14, 125 (1963).
[Crossref]

Hodgkiss, D.

S. T. Henderson and D. Hodgkiss, Brit. J. Appl. Phys. 14, 125 (1963).
[Crossref]

Kerr, G. P.

MacAdam, D. L.

Simonds, J. L.

Taylor, A. H.

Appl. Opt. (1)

Brit. J. Appl. Phys. (1)

S. T. Henderson and D. Hodgkiss, Brit. J. Appl. Phys. 14, 125 (1963).
[Crossref]

J. Opt. Soc. Am. (4)

Other (3)

The trace is the total variance of the energy data over all wavelengths.

Sensitometry Exposure of Daylight-Type Color Films, American Standards Association PH2.11 (1958).

J. Chapman, Technical Note WCLF 53–51 (1953), Photo Reconnaissance Laboratory, Wright Air Development Center, Air Research and Development Command, U. S. Air Force, Wright–Patterson Air Force Base, Ohio.

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Figures (15)

F. 1
F. 1

Diagram illustrating the three principal planes of orientation on which spectroradiometric measurements were made. They include: perpendicular (P–0°) plane, 15° (15°–0°) plane, and normal (N) plane. Altitude h, sun S, azimuth A.

F. 2
F. 2

View of complete installation on the deck of the optical penthouse.

F. 3
F. 3

Spectral distribution of energy of a 15°–0° plane from daylight at a solar altitude of 40°. Hazy II, clear C, light clouds LC, overcast O.

F. 4
F. 4

Spectral distribution of energy on a 15°–0° plane obtained on 26 June 1962 from daylight with clear sky, for solar altitudes of 70°, 40°, 20°, and 8°.

F. 5
F. 5

Spectral distribution of energy on a 15°–0° plane obtained on 3 July 1962 from daylight with clear sky, for solar altitudes of 70°, 40°, 20°, and 8°.

F. 6
F. 6

Spectral distribution of energy on a 15°–0° plane obtained on 15 June 1962 from daylight with hazy sky, for solar altitudes of 70°, 40°, 20°, and 8°.

F. 7
F. 7

Spectral distribution of energy on a 15°–0° plane obtained on 18 June 1962 from daylight with very light to light cloudy sky, for solar altitudes of 70° and 40°.

F. 8
F. 8

Spectral distribution of energy on a 15°–0° plane obtained on 20 June 1962 from daylight with heavy overcast sky, for solar altitudes of 70°, 40°, and 20°.

F. 9
F. 9

Spectral distribution of energy on a 15°–0° plane obtained on 20 June 1962 from daylight with heavy overcast sky, for solar altitudes of 15°, 10°, and 8°.

F. 10
F. 10

Spectral distribution of energy on a P–0°, 15°–0°, and N plane obtained on 3 July 1962 from daylight with clear sky, for a solar altitude of 60°.

F. 11
F. 11

Spectral distribution of energy on a 15°–0°, 15°–30°, and 15°–45° plane obtained on 26 June 1962 from daylight with clear sky, for a solar altitude of 48°.

F. 12
F. 12

Spectral distribution of energy on a 15°–180° plane obtained on 15 June 1962, and 27 June 1962 from clear skylight, for solar altitudes of 70°, 60°, and 50°.

F. 13
F. 13

Spectral distribution of energy on a 15°–180° plane obtained on 15 June 1962, and 27 June 1962, from clear skylight for solar altitudes of 40°, 30°, and 20°.

F. 14
F. 14

Spectral distribution of energy on a 15°–180° plane obtained on 15 June 1962, and 27 June 1962, from clear skylight, for solar altitudes of 15°, 10°, and 8°.

F. 15
F. 15

Correlated color temperature of skylight and daylight for different atmospheric conditions as a function of solar altitude. Curve 1, clear skylight; 15 June 1962, a.m. and 27 June 1962, a.m. Curve 2, daylight, heavy overcast sky, 20 June 1962. Curve 3, daylight, clear sky, 26 June 1962. Curve 4, daylight, clear sky, 3 July 1962. Curve 5, daylight, hazy sky, 15 June 1962, p.m.

Tables (1)

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Table I Chromaticity coordinates and correlated color temperature values.

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

u = 4 x / ( 2 x + 12 y + 3 ) , υ = 6 y / ( 2 x + 12 y + 3 ) .