The Cox–Munk–Plass interaction probability density is used for computing emissivity from a two-dimensional anisotropic model of a rough sea surface. The infrared wavelengths of interest are the 3–5-μm and 8–14-μm bands, and computations are performed in the co-wind and crosswind directions for receiver polar angles varying from the zenith to the horizon. Comparisons between co-wind and crosswind results are made as a function of windspeed, wavelength, and the polar angle of the receiver, with an emphasis on results at the horizon. A method for obtaining upper and lower bounds on the surface emissivity is also given which, in the context of reflection, provides a measure of the effects of multiple reflections.
© 1997 Optical Society of America
Original Manuscript: October 17, 1996
Revised Manuscript: February 12, 1997
Manuscript Accepted: February 12, 1997
Published: August 1, 1997
D. E. Freund, R. I. Joseph, D. J. Donohue, and K. T. Constantikes, "Numerical computations of rough sea surface emissivity using the interaction probability density," J. Opt. Soc. Am. A 14, 1836-1849 (1997)