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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 896–907

Sky-radiance measurements for ocean-color calibration-validation

Richard Santer and Nadège Martiny  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 896-907 (2003)
http://dx.doi.org/10.1364/AO.42.000896


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Abstract

The calibration of an ocean-color sensor or validation of water products is generally based on ground-based extinction measurements from which the aerosol products (optical thickness τ a and aerosol type) are deduced. Sky-radiance measurements complement the extinction measurements mainly in the aerosol-model characterization. Our basic goal is to promote calibration-validation activities based on the radiative properties of the aerosols rather than their chemical or physical properties. A simple method is proposed (and evaluated) to convert sky radiances measured in the principal plane into atmospheric phase functions P. Indeed τ a and P are the required inputs to a radiative-transfer code for predicting the top-of-the-atmosphere radiances. The overall error in this prediction is a few percent. This method can operate on a worldwide network on ground-based sun radiometers and then be used to achieve a statistical analysis for validating satellite products.

© 2003 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(260.5430) Physical optics : Polarization
(280.0280) Remote sensing and sensors : Remote sensing and sensors

History
Original Manuscript: January 28, 2002
Revised Manuscript: August 23, 2002
Published: February 20, 2003

Citation
Richard Santer and Nadège Martiny, "Sky-radiance measurements for ocean-color calibration-validation," Appl. Opt. 42, 896-907 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-896

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