POLARIZATION CHARACTERISTICS OF VHF RADIO-WAVES REELECTED BY THE ES-LAYER

The polarization rotation of the waves reflected by an E(s)-layer are clarified by the measurement of a VHF television signal. Two types of polarization rotation are observed. In one case, the more common of th e two, the polarization rotation varies randomly in a narrow range aro und an angle which rotate from the transmitted horizontal polarization in short period fading. In the other case, which has long period fadi ng in which the polarization rotation varies slowly in a wide range. I t is shown that these polarization characteristics are caused by Farad ay effect in the ionosphere below the E(s)-layer and in the E(s)-layer itself.