Live data straight off the receiver — refreshes every 2 s. Per-aircraft rows show how many messages we received from each aircraft in the last 60 s; if a row is near zero, that aircraft has weak coverage at the antenna, not a software bug.
Last 5 seconds
—msg/s
Total messages—
Aircraft heard—
With position—
Last 60 seconds
—msg/s
Total messages—
Aircraft heard—
With position—
Last 5 minutes
—msg/s
Total messages—
Aircraft heard—
With position—
Message Type Mix (last 60 s)
DF17 ADS-B (position / velocity / ID)—
DF11 all-call replies (transponder ping)—
DF20 / 21 Comm-B (Mode-S elementary)—
DF0 / 4 / 5 surveillance replies—
Coverage & Blind Spots
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good receptionintermittentblind spotrunway/taxiway/apron outlines from OSM
Each cell's color is the gap/(received+gap) ratio for that ~11 m
square (or ~111 m in region scope). Gaps come from track segments
where consecutive fixes are 4–60 s apart: the aircraft really was
somewhere on that line, and we missed it. Hover any cell for raw counts.