OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 34 — Dec. 1, 2008
  • pp: H106–H115

Measuring overcast colors with all-sky imaging

Raymond L. Lee, Jr.  »View Author Affiliations


Applied Optics, Vol. 47, Issue 34, pp. H106-H115 (2008)
http://dx.doi.org/10.1364/AO.47.00H106


View Full Text Article

Enhanced HTML    Acrobat PDF (4623 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Digital images of overcast skies as seen from the earth’s surface open new windows onto the angular details of overcast colors and visible-wavelength spectra. After calibration with a spectroradiometer, a commercial CCD camera equipped with a fisheye lens can produce colorimetrically accurate all-sky maps of overcast spectra. Histograms and azimuthally averaged curves of the resulting chromaticities show consistent, but unexpected, patterns in time-averaged overcast colors. Although widely used models such as LOWTRAN7 and MODTRAN4 cannot explain these characteristic patterns, a simple semiempirical model based on the radiative transfer equation does, and it provides insights into the visible consequences of absorption and scattering both within and beneath overcasts.

© 2008 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(290.1090) Scattering : Aerosol and cloud effects
(330.1730) Vision, color, and visual optics : Colorimetry
(010.1615) Atmospheric and oceanic optics : Clouds
(010.7295) Atmospheric and oceanic optics : Visibility and imaging
(010.1690) Atmospheric and oceanic optics : Color

History
Original Manuscript: April 18, 2008
Manuscript Accepted: June 5, 2008
Published: September 12, 2008

Citation
Raymond L. Lee, Jr., "Measuring overcast colors with all-sky imaging," Appl. Opt. 47, H106-H115 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-34-H106

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited