RF history · 0–60 MHz

Recorded panorama scans, normally 30 minutes apart. Grey areas are missing or unmeasured. Candidate changes are exploratory; confirmed anomaly classification remains unqualified.

Select Load history to inspect the station archive.

Recorded levels are relative and uncalibrated. The difference view uses a rolling median of up to twelve preceding scans, requires at least four, and breaks across missing scans. An active candidate keeps its pre-change baseline until it returns below threshold. Display cells preserve the strongest measured bin; display aggregation does not create finer measurements.

Drag the waterfall to select a frequency range; double-click to reset. Colours: level = dark blue to cyan to yellow; difference = blue decrease, pale neutral, red increase. Timestamp labels use your browser’s local time zone.

Candidate change intervals

Start and stop are bounded by consecutive measured scans. “Ongoing”, gaps, and insufficient baseline remain explicit. Configuration or receiver-location changes can also produce differences; this archive endpoint does not provide same-location qualification.

Strongest 150 frequency-cell intervals are shown; CSV includes all candidates in the visible frequency range. Level colours span −100 to −20 relative dB; signed difference colours span −20 to +20 dB.