HF Propagation: Variation of the Frequency

In the following post I show some visual results of my Voacap simulations. The visualization has been done using some python and shell scripting.

Simulation Parameters

  • Antenna: isotrope
  • Mode: cw (required SNR for circuit reliability calculation: 24 dB)
  • Power: 50W
  • Transmitter location: JO40DA
  • Month: July
  • SSN:72.8
  • Time (UTC): 12h (=day) and 23h (=night)

Night Time – HF Propagates Nicely

SNR (dB)
Circuit Reliability (%)

Day – We have Damping

SNR (dB)
Circuit Reliability (%)
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