Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Luminance of the Sun

Not Accessible

Your library or personal account may give you access

Abstract

Using a photoelectric telephotometer and a calibration source, drift curves of the luminance of the sun along a diameter were obtained for different zenith distances of the sun on clear days. After extrapolation to zero air mass, the luminance B(0,0) at the center of the sun’s disk observed outside the earth’s atmosphere was obtained as 243 000±5000 candles/cm2. The data obtained for the radial distribution of luminance being comparatively less accurate, the standard limb darkening data of Abbot and others were used to give the average luminance B¯=193 000±4000 candles/cm2 and the extraterrestrial total solar illumination Ē0=12 200±300 lumens/ft2 for the mean solar distance. Previous determinations of Ē0 found in the literature are reviewed and compared with these results.

© 1955 Optical Society of America

Full Article  |  PDF Article
More Like This
Illuminance and Luminance under Overcast Skies

Sigmund Fritz
J. Opt. Soc. Am. 45(10) 820-825 (1955)

Search for Discontinuities in the Brightness of the Twilight Sky

R. V. Karandikar
J. Opt. Soc. Am. 45(5) 389-392 (1955)

Sky Luminances and the Directional Luminous Reflectances of Objects and Backgrounds for a Moderately High Sun

Jacqueline I. Gordon and Peggy V. Church
Appl. Opt. 5(5) 793-801 (1966)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved