UAL875 United
Boeing 777 224ER · N76021 · SFO → HND
· 1:07Quality 80side-on
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
- 63%
- First lockfrom target selected
- 20.0 s
- Centring, medianaz / el while locked
- 0.96° / 0.39°
- Centring, 90th pctaz / el while locked
- 4.86° / 2.29°
- Tightest field of viewhorizontal
- 6.6°
- Time to 8°from first lock
- 32.9 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
- 1.06°
- Largest correctionvision vs prediction
- 2.10°
- Zoom steps
- 42
Aircraft & route
- Flight
- UAL875
- Registration
- N76021
- Type
- Boeing 777 224ER
- Airline
- United
- From
- SFO · San Francisco
- To
- HND · Tokyo
- Ground speed
- 192 kt
- Altitude at closest
- 1,200 ft
- Vertical rate
- +2,496 ft/min
- Category
- A5
- ICAO hex
- aa4440
Pass geometry
- Max elevation
- 76.1°
- Elevation at start → end
- 1.4° → 11.9°
- Azimuth at start → end
- 116° ESE → 299° WNW
- Closest-approach azimuth
- 25° NNE
- Minimum slant range
- 407 m
- Heading at closest
- 298° WNW
- Aspect at closest
- side-on (87°)
- Turn
- straight (4°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:07 (67.0 s)
- Lock
- 63%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-16a — main b067f99 (review cleanup)
- Commit
- b067f99
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 33.5 MB · 67.0 s · offset -1.1 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
- -0.03
- 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