Airborne and space-born measurements of outgoing radiation in the 0.4-0.8mm spectral range are discussed. Spectral radiance and degree of polarization of the ocean - atmosphere radiation system as a function of visual angles (0-50°) were derived for altitudes of 1,3 and 6 km. Variation of spectral brightness emitted by the atmosphere-ocean system with visual (160-0-46°) and zenith (5-90°) angles is examined.