Amateur Band Conditions

WSPR

Screen shot of wspr map downloadable from Propagation Map WSPRR and Program Download Here WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions.  Normal transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm.  The program can decode signals with S/N as low as -28 dB in a 2500 Hz bandwidth.  Stations with internet access can automatically upload their reception reports to a central database called WSPRnet , which includes a mapping facility.  To see a live version of the map pictured at top right, click here

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