High‐frequency field strength prediction for ionospheric propagation at short‐ and medium‐range radio paths

Abstract

A precise method of predicting high‐frequency propagation characteristics in magneto active spatially nonuniform ionosphere is described. The method is designed for planning and operating radio communication links ranging 50 … 6000 km at 2.0 … 30.0 MHz. For various seasons and sunspot numbers, the method is shown to be experimentally verified for short paths which constitute the most complex conditions for propagation. In experimental testing the method features prediction error comparable with instrumental error of about 2…3 dB.