Abstract

Measurements have been made of the uncollimated (poor geometry) 1/e transmission distance of light in seawater at ~1200- and 780-m depths, 34 km west of Keahole Point, Hawaii. The measurements were made with 480-nm blue-green light through path lengths of 84.0 and 7.86 m. Transmission distance is determined to be 25.9 m ±1 m at 1.2-km depth and 24.4 m ±1 m at 780-m depth.

© 1984 Optical Society of America

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References

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  1. See, for example, R. C. Smith, K. S. Baker, Appl. Opt. 20, 177 (1981).
    [CrossRef] [PubMed]
  2. J. Ronald, V. Zaneveld, “Optical Properties of the Keahole DUMAND Site,” in Proceedings 1980 DUMAND Symposium, Vol. 1, V. J. Stenger, Ed. (Hawaii DUMAND Center, Honolulu, 1981), p. 1–8.
  3. A. Lewitus, Vertex 4 Cruise Technical Report, Moss Landing Marine Laboratories (1984), in preparation.
  4. See, for example, A. Morel, “Optical Properties of Pure Water and Pure Sea Water,” in Optical Aspects of Oceanography, N. Jerlov, E. S. Nielsen, Eds. (Academic, New York, 1974).

1981 (1)

Baker, K. S.

Lewitus, A.

A. Lewitus, Vertex 4 Cruise Technical Report, Moss Landing Marine Laboratories (1984), in preparation.

Morel, A.

See, for example, A. Morel, “Optical Properties of Pure Water and Pure Sea Water,” in Optical Aspects of Oceanography, N. Jerlov, E. S. Nielsen, Eds. (Academic, New York, 1974).

Ronald, J.

J. Ronald, V. Zaneveld, “Optical Properties of the Keahole DUMAND Site,” in Proceedings 1980 DUMAND Symposium, Vol. 1, V. J. Stenger, Ed. (Hawaii DUMAND Center, Honolulu, 1981), p. 1–8.

Smith, R. C.

Zaneveld, V.

J. Ronald, V. Zaneveld, “Optical Properties of the Keahole DUMAND Site,” in Proceedings 1980 DUMAND Symposium, Vol. 1, V. J. Stenger, Ed. (Hawaii DUMAND Center, Honolulu, 1981), p. 1–8.

Appl. Opt. (1)

Other (3)

J. Ronald, V. Zaneveld, “Optical Properties of the Keahole DUMAND Site,” in Proceedings 1980 DUMAND Symposium, Vol. 1, V. J. Stenger, Ed. (Hawaii DUMAND Center, Honolulu, 1981), p. 1–8.

A. Lewitus, Vertex 4 Cruise Technical Report, Moss Landing Marine Laboratories (1984), in preparation.

See, for example, A. Morel, “Optical Properties of Pure Water and Pure Sea Water,” in Optical Aspects of Oceanography, N. Jerlov, E. S. Nielsen, Eds. (Academic, New York, 1974).

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Figures (5)

Fig. 1
Fig. 1

System schematic.

Fig. 2
Fig. 2

Photodetector schematic.

Fig. 3
Fig. 3

Effect of misalignment on detected light intensity.

Fig. 4
Fig. 4

Received intensity, short cable.

Fig. 5
Fig. 5

Received intensity, long cable.

Tables (3)

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Table I Values of Recorded Signals IS and IL, Exponential Transmission Distance β, and Corresponding Statistical Uncertainties

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Table II Effects of Major Uncertainties

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Table III Cable Length vs Instrument Depth Determined by Acoustic Pinger

Equations (5)

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I s = I 0 exp ( - S / β ) / S 2             I L = I 0 exp ( - L / β ) / L 2 .
β = ( L - S ) / ln ( S 2 I S / L 2 I L ) = 76.13 / ln ( 0.00878 I S / I L ) .
δ β / β = / ( L - S ) ( δ I L / I L )
δ β / β = ˙ 1 / 3 ( δ I L / I L ) = ˙ - 1 / 3 ( δ I S / I S ) .
δ I S / I S = - 6.5 % , δ I L / I L = - 6 % , or δ β / β = - 2 , + 2.2 % .

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