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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 11 — Apr. 10, 2007
  • pp: 2091–2098

Validation of an 8–14 μm cloud monitor using visual observations of antarctic cloud cover

Michael P. McCarthy, G. Hernandez, Anthony Mactutis, and John A. Moore  »View Author Affiliations


Applied Optics, Vol. 46, Issue 11, pp. 2091-2098 (2007)
http://dx.doi.org/10.1364/AO.46.002091


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Abstract

A cloud monitor instrument, sensing 8 14 μ m infrared radiation, has been installed near McMurdo, Antarctica, in order to provide supporting cloud cover information for a high-resolution sky-viewing Fabry–Perot spectrometer experiment. Validation of the cloud monitor observations was performed by a 1 year long comparison with the available 6 h visual cloud observations, expressed in octas (obscured eighths of the sky). The agreement between visual observations and those of the cloud monitor is good—the variation being slightly over one step, or octa—except at the clear sky extreme, which the subjective visual observations tend to overestimate during dark and moonless conditions. Both visual observations and the cloud monitor measurements show an austral winter–summer difference with the winter being clearer.

© 2007 Optical Society of America

OCIS Codes
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(010.3920) Atmospheric and oceanic optics : Meteorology
(040.3060) Detectors : Infrared

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: June 20, 2006
Revised Manuscript: November 29, 2006
Manuscript Accepted: November 30, 2006
Published: March 20, 2007

Citation
Michael P. McCarthy, G. Hernandez, Anthony Mactutis, and John A. Moore, "Validation of an 8-14 μm cloud monitor using visual observations of antarctic cloud cover," Appl. Opt. 46, 2091-2098 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-11-2091

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