Abstract

Spectral in-water measurements of downward irradiance (E d), upward irradiance (E u), and nadir radiance ( L u) are sufficient to calculate the scalar irradiances E 0, E 0d, and E 0u, the average cosines μ, μd, and μu, the light absorption coefficient a, the backscattering coefficient b b, and the so-called f factor that relates to R, a, and b b. The solar elevation of 42° is a special case in which μd is independent of all variables except solar elevation. The algorithms are valid for solar elevations between 12° and 81° for horizontally stratified clear and turbid deep waters.

© 2001 Optical Society of America

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