1992 年 16 巻 11 号 p. 1-6
The carrier to noise ratio (C/N) is used for the video reception quality evaluation. It is influenced considerably by the meteorological phenomena and the noise temperature due to the rainfall. The carrier C falls down due to the rain attenuation and rain noise temperature has a great value as regards the noise N. The measurement is carried out with different antenna aperture depends on the types. Several new phenomena became known the results of the observations.