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 E0, E0d , and E0u , the average cosines μ, μ d , and μ u , 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 μ d 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
Original Manuscript: November 27, 2000
Revised Manuscript: May 1, 2001
Published: September 20, 2001
Niels Kristian Højerslev, "Analytic remote-sensing optical algorithms requiring simple and practical field parameter inputs," Appl. Opt. 40, 4870-4874 (2001)