Field radiometry measurements of the effective emissivity and complex dielectric constant of the sea surface

The paper describes a non-calibration radiometric method for measuring the effective emissivity Eeff of a rough underlying surface. The method does not require absolute calibration of the radiometer, but uses a black body with the temperature of the underlying surface. This simplifies measurements and makes it possible to measure the dependences of the effective emissivity both on the parameters of the underlying surface itself, which are recorded at the measurement site, and on the parameters of the atmosphere. The effective emissivity Eeff harmoniously corresponds to the radiation transfer model and the equations that can be used for sounding the Earth from spacecraft. The method allows to measure the real and imaginary parts of the dielectric constant of underlying surface under natural conditions. The data of field measurements performed from the offshore platform are presented.