WSPR (Weak Signal Propagation Reporter) is a digital mode and companion software used by amateur radio operators to study and map radio propagation. It transmits and decodes ultra-low-power, narrowband signals synchronized to UTC time slots, enabling reception over long distances under marginal conditions. The software automates transmit/receive cycles, extracts signals near the noise floor, and records “spots” (who heard whom and at what signal-to-noise ratio). These reports can be uploaded to community databases like WSPRnet to visualize real-time paths, compare frequency bands, and evaluate antennas, power levels, and station performance.
WSPR is designed for unattended beaconing, coverage mapping, and experimentation, not for two-way conversations. It typically supports multiple HF and VHF/UHF bands, requires accurate timekeeping, and works with common transceivers via an audio interface or SDR. Its extremely narrow bandwidth and efficiency make it ideal for exploring propagation with just milliwatts of power.
WSPR is used by 3 users of Software Informer. The most popular versions of this product among our users are: 1.0, 2.0 and 2.1. The name of the program executable file is wspr.exe.
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