UAL2177 United
Boeing 737NG 824/W · N73291 · SFO → ?
· 1:57Quality 86side-onturned 32°
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
- 96%
- First lockfrom target selected
- 4.3 s
- Centring, medianaz / el while locked
- 0.12° / 0.11°
- Centring, 90th pctaz / el while locked
- 0.32° / 0.35°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 4.6 s
- Time to tightestfrom first lock
- 68.5 s
- Time at telefield of view ≤ 5.5°
- 101.7 s
- Jitter at teleaz / el, standard deviation
- 0.18° / 0.20°
- Swing at teleaz / el, peak to peak
- 1.21° / 1.52°
- Pan reversalsper 10 s at tele
- 0.1
- Largest pan hopin any 1 s at tele
- 4.59°
- Largest tilt hopin any 1 s at tele
- 3.72°
- Pose error, mediancommand vs camera
- 0.50°
- Largest correctionvision vs prediction
- 1.69°
- Zoom steps
- 16
Aircraft & route
- Flight
- UAL2177
- Registration
- N73291
- Type
- Boeing 737NG 824/W
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 292 kt
- Altitude at closest
- 7,125 ft
- Vertical rate
- +2,944 ft/min
- Category
- A3
- ICAO hex
- a9d626
Pass geometry
- Max elevation
- 40.4°
- Elevation at start → end
- 18.5° → 13.7°
- Azimuth at start → end
- 330° NNW → 200° SSW
- Closest-approach azimuth
- 266° W
- Minimum slant range
- 3.4 km
- Heading at closest
- 183° S
- Aspect at closest
- side-on (83°)
- Turn
- turned 32°
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:57 (117.2 s)
- Lock
- 96%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-15p — selection hysteresis; auto-cal drops stale bias
- Commit
- b8aa462
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 56.9 MB · 116.0 s · offset -1.7 s
- pursuit
- velocity
- maxLeadSec
- 3
- panLatencySec
- 0.6
- tiltLatencySec
- 0.4
- rippleDeg
- 0.5
- rippleTeleDeg
- 0.25
- maxSpeedStepFwps
- 0.45
- speedReachFrac
- 0.8
- lockedSigmaDeg
- 0.35
- sigmaGrowthDps
- 0.1
- aimLeadSec
- -0.16
- 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