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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 25 — Dec. 6, 2010
  • pp: 26313–26324

Removal of surface-reflected light for the measurement of remote-sensing reflectance from an above-surface platform

ZhongPing Lee, Yu-Hwan Ahn, Curtis Mobley, and Robert Arnone  »View Author Affiliations


Optics Express, Vol. 18, Issue 25, pp. 26313-26324 (2010)
http://dx.doi.org/10.1364/OE.18.026313


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Abstract

Using hyperspectral measurements made in the field, we show that the effective sea-surface reflectance ρ (defined as the ratio of the surface-reflected radiance at the specular direction corresponding to the downwelling sky radiance from one direction) varies not only for different measurement scans, but also can differ by a factor of 8 between 400 nm and 800 nm for the same scan. This means that the derived water-leaving radiance (or remote-sensing reflectance) can be highly inaccurate if a spectrally constant ρ value is applied (although errors can be reduced by carefully filtering measured raw data). To remove surface-reflected light in field measurements of remote sensing reflectance, a spectral optimization approach was applied, with results compared with those from remote-sensing models and from direct measurements. The agreement from different determinations suggests that reasonable results for remote sensing reflectance of clear blue water to turbid brown water are obtainable from above-surface measurements, even under conditions of high waves.

© 2010 OSA

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

ToC Category:
Remote Sensing

History
Original Manuscript: September 28, 2010
Revised Manuscript: November 9, 2010
Manuscript Accepted: November 10, 2010
Published: December 1, 2010

Citation
ZhongPing Lee, Yu-Hwan Ahn, Curtis Mobley, and Robert Arnone, "Removal of surface-reflected light for the measurement of remote-sensing reflectance from an above-surface platform," Opt. Express 18, 26313-26324 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-25-26313


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  28. A Microsoft Excel template of this processing scheme is available for interested practitioners.

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