UAL869 United
Boeing 777 300ER · N2243U · SFO → HKG
· 0:49Quality 76nose/tail
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −84%). Download
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
- 57%
- First lockfrom target selected
- 11.9 s
- Centring, medianaz / el while locked
- 0.78° / 0.65°
- Centring, 90th pctaz / el while locked
- 4.13° / 12.56°
- Tightest field of viewhorizontal
- 6.6°
- Time to 8°from first lock
- 32.3 s
- Time to tightestfrom first lock
- 33.1 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
- 1.42°
- Largest correctionvision vs prediction
- 1.00°
- Zoom steps
- 30
Aircraft & route
- Flight
- UAL869
- Registration
- N2243U
- Type
- Boeing 777 300ER
- Airline
- United
- From
- SFO · San Francisco
- To
- HKG · Hong Kong
- Ground speed
- 204 kt
- Altitude at closest
- 950 ft
- Vertical rate
- +2,560 ft/min
- Category
- A5
- ICAO hex
- a1f2b1
Pass geometry
- Max elevation
- 84.8°
- Elevation at start → end
- 2.2° → 13.2°
- Azimuth at start → end
- 116° ESE → 298° WNW
- Closest-approach azimuth
- 14° NNE
- Minimum slant range
- 334 m
- Heading at closest
- 297° WNW
- Aspect at closest
- nose/tail (3°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:49 (49.0 s)
- Lock
- 57%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14i — zoom sigma grows after lock loss (0.1°/s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 24.5 MB · 49.0 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
- 0.59
- 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