VHF/HF Propagation
VHF/HF Propagation
VHF/HF Propagation:
Greyline course:
Solar data:
History of the last 30 days:
Abbreviations:
Greyline: Day-night boundary on Earth.
MUF: Maximum usable Frequency.
SN: Current sunspot number.
SFI: Solar Flux Index (radio flux index of the sun).
S-Noice: Signal-Noice (signal-to-noise ratio).