A D region mid- and high-latitude approximation to the Sen-Wyller refractive index equations


  • W. A. Flood


Approximate expressions for high-frequency D region refractive indices at mid-latitudes are developed from the exact Sen-Wyller formula. The proposed approximations, suitable for use with partial reflection and wave interaction experiments, are significantly better than the use of the strictly longitudinal Sen-Wyller approximations at mid-latitude. It is suggested that this approximation be incorporated into D region partial reflection and wave interaction experiments.