WSPR
WSPR (short for Weak Signal Propagation Reporter) is an amateur radio beacon protocol. It is designed to act as an incredibly weak signal beacon, used for examining amateur band conditions. It utilizes 2 minute long transmission times and provides callsign, location, and power information. It is available in WSJT and WSJT-X.
Frequencies[edit]
136 kHzKiloHertz (kHz) 10^3 Hz
474.2 kHzKiloHertz (kHz) 10^3 Hz
1.8366 MHzMegaHertz (MHz) 10^6 Hz
3.5686 MHzMegaHertz (MHz) 10^6 Hz
7.0386 MHzMegaHertz (MHz) 10^6 Hz
10.1387 MHzMegaHertz (MHz) 10^6 Hz
14.0956 MHzMegaHertz (MHz) 10^6 Hz
18.1046 MHzMegaHertz (MHz) 10^6 Hz
21.0946 MHzMegaHertz (MHz) 10^6 Hz
24.9246 MHzMegaHertz (MHz) 10^6 Hz
28.1246 MHzMegaHertz (MHz) 10^6 Hz
50.2930 MHzMegaHertz (MHz) 10^6 Hz (Region 2, 3)
70.0910 MHzMegaHertz (MHz) 10^6 Hz (Region 1)
70.1510 MHzMegaHertz (MHz) 10^6 Hz
144.4890 MHzMegaHertz (MHz) 10^6 Hz
432.3000 MHzMegaHertz (MHz) 10^6 Hz
1.2965 GHzGigaHertz (GHz) 10^9 Hz