The influence of ionospheric models on calculations of decametric wave propagation

Statistics – Computation

Scientific paper

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Atmospheric Models, Computation, Decametric Waves, Ionospheric Propagation, Mathematical Models, Radio Transmission, Diurnal Variations, F 2 Region, High Frequencies, Ray Tracing, Solar Activity

Scientific paper

The ionospheric F2-layer critical plasma frequency foF2 is one key geophysical parameter among those involved in HF wave propagation. This means that the efficiency of numerical methods available for HF waves propagation simulation (e.g., ray tracing) is greatly limited by the uncertainties inherent to the foF2 input models. Observed planetary distributions of monthly median foF2 and those calculated by current models which give values of error bars on foF2 are compared systematically. Further, an accurate ray tracing method used with F2-region models in which foF2 is perturbed in amounts equal to typical values of its error bars helps to assess the influence of these error bars on HF waves propagation results.

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