The total outgoing radiance at top-of-atmosphere over the ocean contributes mostly from the atmosphere scattering. We calculated angular distribution of scattering at 0.55μm at TOA over Amoy ocean area from aerosol optical thickness measurements on ground. The outgoing radiances and the irradiances were inferred from 6 S atmospheric radiative transfer code. The calculated values of calculating total irradiance on the sea surface were compared with Pyranometer measurements, the relative errors are less then 10%.