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Maximum usable frequence (MUF) is the highest frequency that supports communication between two points. On this map, MUF can be considered the maximum used frequency, since the display is based on real-time data.
Data for the map is gathered from several online sources: WSPRnet, Reverse Beacon Network (CW, FT4, FT8), and DX Cluster. Some of these sources provide signal-to-noise ratio (SNR) information.
SNR can be used to determine if a particular path supports certain modes like morse code (CW) or single sideband (SSB).
The map indicates SNR levels with three different per-band shades: SSB (SNR > 10), CW (SNR > -1), or digital modes (which can decode down to an SNR of about -28).A VHF Propagation Map shows real-time propagation on the 2 meter band.
|muf ||1.8 ||3.5 ||5.3 ||7 ||10 ||14 ||18 ||21 ||24 ||28 ||50 ||all