UAL574 United
Boeing 737-9 · N37547 · SFO → ?
· 0:20Quality 58lost lockwrap pinnedquarteringDead-zone wrap
Trace
Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.
—FOV —az —el —pose —
Loading telemetry…
Lock
Events
Tracking metrics
How well the camera kept the aircraft centred. Tap a metric for what it means and what good looks like.
- Lockshare of the pass
- 38%
- First lockfrom target selected
- 1.4 s
- Centring, medianaz / el while locked
- 10.66° / 0.39°
- Centring, 90th pctaz / el while locked
- 17.96° / 1.00°
- Tightest field of viewhorizontal
- 5.6°
- Time to 8°from first lock
- 17.3 s
- Time to tightestfrom first lock
- 18.0 s
- Time at telefield of view ≤ 5.5°
- 0.0 s
- Jitter at teleaz / el, standard deviation
- —
- Swing at teleaz / el, peak to peak
- —
- Pan reversalsper 10 s at tele
- —
- Largest pan hopin any 1 s at tele
- —
- Largest tilt hopin any 1 s at tele
- —
- Pose error, mediancommand vs camera
- 0.50°
- Largest correctionvision vs prediction
- 3.08°
- Zoom steps
- 17
Aircraft & route
- Flight
- UAL574
- Registration
- N37547
- Type
- Boeing 737-9
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 307 kt
- Altitude at closest
- 9,450 ft
- Vertical rate
- +2,432 ft/min
- Category
- A3
- ICAO hex
- a44962
Pass geometry
- Max elevation
- 23.2°
- Elevation at start → end
- 23.2° → 18.4°
- Azimuth at start → end
- 221° SW → 210° SSW
- Closest-approach azimuth
- 221° SW
- Minimum slant range
- 7.4 km
- Heading at closest
- 184° S
- Aspect at closest
- quartering (37°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- Yes — pan pre-positioned across the stop
- Duration
- 0:20 (19.6 s)
- Lock
- 38%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-13i — slower zoom ladder (one rung, 1.5 s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 9.5 MB · 19.0 s · offset -1.0 s
- pursuit
- velocity
- maxLeadSec
- 3
- panLatencySec
- 0.6
- tiltLatencySec
- 0.4
- rippleDeg
- 0.5
- rippleTeleDeg
- 0.25
- rateFloorDegPerDps
- 2.5
- rateFloorMaxDeg
- 12
- lockedSigmaDeg
- 0.35
- correctionSlewDps
- 2.5
- kp
- 1
- ki
- 0.6
This clip and poster are © Skylight (Cameron Paczek): free for non-commercial use with credit to skylightceiling.com, not MIT. License