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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 17 — Jun. 10, 2010
  • pp: 3282–3290

Bichromatic method for identification of clear-sky scenarios over ground pixel viewed from space

Suniti Sanghavi, Ulrich Platt, and Jochen Landgraf  »View Author Affiliations


Applied Optics, Vol. 49, Issue 17, pp. 3282-3290 (2010)
http://dx.doi.org/10.1364/AO.49.003282


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Abstract

We propose a method for identifying clear-sky scenarios from a measurement time series over satellite-observed ground pixels of unknown surface albedo and aerosol type. The lack of a general monotonic relationship between aerosol loading and observed reflectance encumbers the ordering of the observation time series according to aerosol loading. This problem is ameliorated by using two wavelengths at which the surface albedos are known to differ. Treating an observation as being cloud/aerosol free allows for the determination of the corresponding Lambertian equivalent albedo, the relative contrast of which at the two wavelengths varies monotonically with respect to aerosol-loading, clear-sky and completely clouded scenarios representing the extreme cases. Applying this method to the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography measurements over a nondark surface, we validate it by comparing measured against modeled O 2 A- and B-band absorption at the retrieved albedo in an aerosol-free atmosphere.

© 2010 Optical Society of America

OCIS Codes
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(010.1285) Atmospheric and oceanic optics : Atmospheric correction
(010.0280) Atmospheric and oceanic optics : Remote sensing and sensors

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: December 1, 2009
Manuscript Accepted: April 26, 2010
Published: June 3, 2010

Citation
Suniti Sanghavi, Ulrich Platt, and Jochen Landgraf, "Bichromatic method for identification of clear-sky scenarios over ground pixel viewed from space," Appl. Opt. 49, 3282-3290 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-17-3282


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References

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