The Relation Between the Specular-to-Interference Ratio and the Scintillation Index

This concise paper points out evidence that in many cases the fluctuations in a signal transmitted through ionospheric irregularities do not obey Rician statistics and that therefore, the Rician relation between the specular-to-interference ratio and the scintillation index, recently discussed by Shaft, may not apply to ionospheric communications studies in these cases.