Examine small, time-dependent variations in WSPR frequency reports across geographical receiver populations and paths. Compare individual stations, smoothed trends, and distances without assuming an ionospheric disturbance.
Unlike FT8/FT4/FT2, WSPR does not have verified transmitter-frequency matching here. Its receiver/population medians are relative; this analysis cannot separate transmitter, receiver and propagation effects conclusively.
Drag inside the shaded sector to rotate it. Drag its side handles to adjust width, or the inner/outer handles for distance. Numeric controls remain precise.
Simplified azimuthal-equidistant coastline guide centred on IO70pq (20,000 km radius). Receiver locations only; coastlines are indicative and do not reconstruct ionospheric paths.
Existing report-level plot and adjustable short smoothing. Zoom with Plotly; changing controls preserves the view of this dataset.
Long variation uses coarser time bins, with a separate smoothing window. It is not subtracted from the short trace.
Windows use actual observations only, without interpolation. Curves connect available time-window medians and can bridge missing intervals; apparent periodicity is not established by smoothing. Changing receivers can change population medians.
Select up to five repeated receiver traces. No interpolation across missing transmissions; reports can reflect different WSPR transmissions.
Counts below refer to the current filtered selection and do not establish independent receiver stability.