UAL393 United
Boeing 737 MAX 9 · N27419 · SFO → ?
· 1:32Quality 76side-onturned left 54°Dead-zone wrap
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −58%). Download
Trace
Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.
—FOV —az —el —pose —
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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
- 58%
- First lockfrom target selected
- 12.9 s
- Centring, medianaz / el while locked
- 0.79° / 0.41°
- Centring, 90th pctaz / el while locked
- 3.07° / 1.05°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 7.8 s
- Time to tightestfrom first lock
- 79.2 s
- Time at telefield of view ≤ 5.5°
- 6.3 s
- Jitter at teleaz / el, standard deviation
- 0.66° / 0.28°
- Swing at teleaz / el, peak to peak
- 2.40° / 0.83°
- Pan reversalsper 10 s at tele
- 3.2
- Largest pan hopin any 1 s at tele
- 3.97°
- Largest tilt hopin any 1 s at tele
- 1.51°
- Pose error, mediancommand vs camera
- 1.27°
- Largest correctionvision vs prediction
- 1.97°
- Zoom steps
- 65
Aircraft & route
- Flight
- UAL393
- Registration
- N27419
- Type
- Boeing 737 MAX 9
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 299 kt
- Altitude at closest
- 8,400 ft
- Vertical rate
- +3,456 ft/min
- Category
- A3
- ICAO hex
- a2b7f5
Pass geometry
- Max elevation
- 42.8°
- Elevation at start → end
- 19.1° → 20.0°
- Azimuth at start → end
- 334° NNW → 190° S
- Closest-approach azimuth
- 264° W
- Minimum slant range
- 3.8 km
- Heading at closest
- 183° S
- Aspect at closest
- side-on (81°)
- Turn
- turned left 54°
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- Yes — pan pre-positioned across the stop
- Duration
- 1:32 (92.4 s)
- Lock
- 58%
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
- 46.0 MB · 92.0 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