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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 25 — Sep. 1, 2004
  • pp: 4957–4964

Effects of molecular and particle scatterings on the model parameter for remote-sensing reflectance

ZhongPing Lee, Kendall L. Carder, and KePing Du  »View Author Affiliations


Applied Optics, Vol. 43, Issue 25, pp. 4957-4964 (2004)
http://dx.doi.org/10.1364/AO.43.004957


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Abstract

For optically deep waters, remote-sensing reflectance (rrs) is traditionally expressed as the ratio of the backscattering coefficient (b b ) to the sum of absorption and backscattering coefficients (a + b b ) that multiples a model parameter (g, or the so-called f′/Q). Parameter g is further expressed as a function of b b /(a + b b ) (or b b /a) to account for its variation that is due to multiple scattering. With such an approach, the same g value will be derived for different a and b b values that provide the same ratio. Because g is partially a measure of the angular distribution of upwelling light, and the angular distribution from molecular scattering is quite different from that of particle scattering; g values are expected to vary with different scattering distributions even if the b b /a ratios are the same. In this study, after numerically demonstrating the effects of molecular and particle scatterings on the values of g, an innovative rrs model is developed. This new model expresses rrs in two separate terms: one governed by the phase function of molecular scattering and one governed by the phase function of particle scattering, with a model parameter introduced for each term. In this way the phase function effects from molecular and particle scatterings are explicitly separated and accounted for. This new model provides an analytical tool to understand and quantify the phase-function effects on rrs, and a platform to calculate rrs spectrum quickly and accurately that is required for remote-sensing applications.

© 2004 Optical Society of America

OCIS Codes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.1350) Scattering : Backscattering
(290.5840) Scattering : Scattering, molecules
(290.5850) Scattering : Scattering, particles

History
Original Manuscript: January 15, 2004
Revised Manuscript: May 10, 2004
Manuscript Accepted: May 24, 2004
Published: September 1, 2004

Citation
ZhongPing Lee, Kendall L. Carder, and KePing Du, "Effects of molecular and particle scatterings on the model parameter for remote-sensing reflectance," Appl. Opt. 43, 4957-4964 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-25-4957

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