Angle and Doppler measurements of the quasi-coherent and incoherent components of microwave transhorizon signals

This communication compares the differences between the quasi-coherent and incoherent components of microwave transhorizon signals where the differences are exhibited in the received-signal characteristics in several respects: the distribution of the signal level, the shape of the antenna response patterns, and the width of the RF Doppler spectrum. These differences are also accompanied by corresponding differences in the meterological profiles. There is a clear implication that the atmospheric structure giving rise to the transhorizon scatter of the propagated radio wave is markedly different for each case. The important point of this work is that the distinctions between the quasi-coherent and incoherent components of the signal are revealed in independently measured quantities.