PhosphorHertz

HF PROPAGATION

Real-time HF radio propagation monitor. NOAA space weather data translated into band-by-band conditions. Native on iPad, drawn larger for the bigger screen. Astronomy from AstroEngine, measured against NASA JPL.

HF propagation app for iPhone and iPad. Real-time shortwave band conditions from NOAA space weather data. Check which ham radio bands are open — 160m through 10m — before you transmit. Runs natively on iPad, with larger type and the layout opened out for the bigger screen. Its astronomy comes from AstroEngine, the on-device engine shared across our sky apps and measured against NASA JPL Horizons.