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Pin retina-simulation to the merged live-ADS-B feed sanity (c62f6e4) #362

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Merged
jehanazad merged 1 commit into from
Sep 13, 2026
+9 −4
Merged

Pin retina-simulation to the merged live-ADS-B feed sanity (c62f6e4) #362

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11 changes: 8 additions & 3 deletions docs/simulation.md
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Original file line number Diff line number Diff line change
Expand Up @@ -145,9 +145,14 @@ orchestrator polls the feed's `/v2/point/{lat}/{lon}/{radius_nm}` for the
(`SimulationWorld.ingest_live_aircraft`). Each real aircraft becomes a
`live-<hex>` world aircraft flying its reported position, altitude, ground
speed, track and vertical rate — extrapolated from the fix's capture time,
dead-reckoned between polls, dropped 60 s after the feed last reported it.
The synthetic nodes echo it like any other aircraft (delay/Doppler from its
real kinematics), so the fleet flies real traffic.
dead-reckoned between polls, dropped 60 s after its last fix (not after the
feed last echoed a stale row for it), and retired on the spot when the feed
reports it on the ground. The feed is not trusted blindly: a row whose fix is
already older than that window is ignored, and an altitude that jumps more
than 1 km from the coasted one is held off unless it persists, self-consistently,
for a minute (adsb.retina.fm has been seen serving another aircraft's cruise
altitude in a low GA row). The synthetic nodes echo it like any other aircraft
(delay/Doppler from its real kinematics), so the fleet flies real traffic.

The feed owns these aircraft: no waypoints, no separation slowing, no
lifetime, and they never count toward `min_aircraft` / `max_aircraft` —
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2 changes: 1 addition & 1 deletion libs/retina-simulation
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Submodule retina-simulation updated 3 files
+19 −5 retina_simulation/live_adsb.py
+116 −13 retina_simulation/world.py
+190 −4 tests/test_live_adsb.py
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