NUMERICAL COMPUTATIONS OF ROUGH SEA-SURFACE EMISSIVITY USING THE INTERACTION PROBABILITY DENSITY

The Cox-Munk-Plass interaction probability density is used for computi ng emissivity from a two-dimensional anisotropic model of a rough sea surface. The infrared wavelengths of interest are the 3-5-mu m and 8-1 4-mu m bands, and computations are performed in the co-wind and crossw ind directions for receiver polar angles varying from the zenith to th e horizon. Comparisons between co-wind and crosswind results are made as a function of windspeed, wavelength, and the polar angle of the rec eiver, with an emphasis on results at the horizon. A method for obtain ing upper and lower bounds on the surface emissivity is also given whi ch, in the context of reflection, provides a measure of the effects of multiple reflections. (C) 1997 Optical Society of America.