Forecasting and updating HF channel parameters on the basis of oblique chirp sounding


  • Vladimir A. Ivanov,

  • Nataliya V. Ryabova,

  • Vladimir V. Shumaev,

  • Valery P. Uryadov


Lowest observed frequency (LOF) and maximum observed frequency (MOF) spatial-temporal correlation data for midlatitude long-distance paths are presented. The possibility of improving LOF and MOF forecasting accuracy for links without diagnostic systems by means of linear regression methods and a semiempincal ionospheric model is investigated, and a comparison is made of the effectiveness of providing HF communication frequencies on the basis of long-term forecasting and real-time channel evaluation.