Weak signal propagation reporter is an amateur radio software protocol used for sending and receiving low-power transmissions to map global propagation paths. The system uses narrow-band frequency-shift keying and strong forward error correction to decode signals that are well below the noise floor. Stations automatically upload their reception reports to a central database, creating real-time maps of atmospheric radio conditions.
I left the rig running WSPR overnight on 20 meters and was spotted by a station in Australia.
Pronounced whisper by operators. It is strictly for beaconing and propagation analysis, not for two-way conversation.
Related terms
HF
High frequency designates the portion of the radio spectrum between 3 and 30 megahertz.
Software defined radio
A radio communication system where components typically implemented in hardware are instead implemented by software.
Propagation mode
The specific path or physical mechanism by which an electromagnetic wave travels from a transmitter to a receiver.