Abstract

Ruddick et al. [Appl. Opt. 39, 897 (2000)] extended the standard SeaWiFS atmospheric-correction algorithm for use over turbid coastal and inland waters. However, Ruddick’s method is based on the assumption of a spatially homogeneous constant ratio for the water-leaving reflectances normalized by the sun-sea atmospheric transmittance at 765 and 865 nm. Such first-order b b/a model-based assumption can result in an inaccuracy for highly turbid water. Using the first- and second-order b b/(a + b b) models as well as the second-order b b/a model (which, more realistically, do not assume spatial homogeneity ratio), we suggest using the modified assumption, R (8)-1 = α0 R (7)-1 + (l 1 Q)-1 (1 - α0), instead of Ruddick’s assumption, in SeaWiFS atmospheric-correction algorithms for highly turbid waters.

© 2003 Optical Society of America

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References

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  1. K. G. Ruddick, F. Ovidio, M. Rijkeboer, “Atmospheric correction of SeaWiFS imagery for turbid coastal and inland waters,” Appl. Opt. 39, 897–912 (2000).
    [CrossRef]
  2. C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
    [CrossRef]
  3. H. R. Gordon, O. B. Morel, M. M. Jacobs, “Computed relationships between the inherent and apparent optical properties of a flat homogeneous ocean,” Appl. Opt. 14, 417–427 (1975).
    [CrossRef] [PubMed]
  4. H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
    [CrossRef]

2000 (2)

K. G. Ruddick, F. Ovidio, M. Rijkeboer, “Atmospheric correction of SeaWiFS imagery for turbid coastal and inland waters,” Appl. Opt. 39, 897–912 (2000).
[CrossRef]

C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
[CrossRef]

1988 (1)

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

1975 (1)

Baker, K. S.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Brown, J. W.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Brown, O. B.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Carder, K. L.

C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
[CrossRef]

Clark, D. K.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Evans, R. H.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Gordon, H. R.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

H. R. Gordon, O. B. Morel, M. M. Jacobs, “Computed relationships between the inherent and apparent optical properties of a flat homogeneous ocean,” Appl. Opt. 14, 417–427 (1975).
[CrossRef] [PubMed]

Hu, C.

C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
[CrossRef]

Jacobs, M. M.

Morel, O. B.

Müller-Karger, F. E.

C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
[CrossRef]

Ovidio, F.

Rijkeboer, M.

Ruddick, K. G.

Smith, R. C.

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Appl. Opt. (2)

J. Geophys. Res. (1)

H. R. Gordon, O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, D. K. Clark, “A semianalytical radiance model of ocean color,” J. Geophys. Res. 93, 10,909–10,924 (1988).
[CrossRef]

Remote Sens. Environ. (1)

C. Hu, K. L. Carder, F. E. Müller-Karger, “Atmospheric correction of SeaWiFS imagery over turbid coastal waters: a practical method,” Remote Sens. Environ. 74, 195–206 (2000).
[CrossRef]

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Figures (1)

Fig. 1
Fig. 1

α/α0 as a function of R (8) for (1) Ruddick et al.’s first-order b b /a model, (2) Ruddick et al’s second-order b b /a model, (3) Gordon et al’s second-order b b /(a + b b ) model, and (4) first-order b b /(a + b b ) model, with a case of l 1 Q = 0.0949*π, a (7) = 2.586 m-1, a (8) = 4.436 m-1, and b b (7) = b b (8).

Equations (13)

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εm7,8=ρam7/ρam8.
α=ρw7/T07/ρw8/T08.
α=R7/R8
R=1/MQ/πρw/T0.
α0=bb7/bb8a8/a7
R7/Q=l1bb7/a7+bb7=l1bb7/a7/1+bb7/a7,R8/Q=l1bb8/a8+bb8=l1bb8/a8/1+bb8/a8.
R8-1=bb7/bb8a8/a71+bb8/a8/1+bb7/a7R7-1 =bb7/bb8a8/a71+bb7/a7-bb7/a7+bb8/a8/1+bb7/a7R7-1 =bb7/bb8a8/a71+bb8/a8-bb7/a7/1+bb7/a7R7-1 =bb7/bb8a8/a71+bb8/a8/bb7/a7-1bb7/a7/1+bb7/a7R7-1 =bb7/bb8a8/a7R7-1+l1Q-11-bb7/bb8a8/a7.
R8-1=α0R7-1+l1Q-11-α0.
α/α0=1-l1Q-11-α0R7
α/α0=1-l1Q-11-α0R8-1.
R7/Q=l1bb7/a7+bb7+l2bb7/a7+bb72,R8/Q=l1bb8/a8+bb8+l2bb8/a8+bb82,
R7/Q=l1bb7/a7+l2-l1bb7/a72,R8/Q=l1bb8/a8+l2-l1bb8/a82,
R7/Q=l1bb7/a7,R8/Q=l1bb8/a8.

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