UAL948 United
Boeing 787-9 · N81105 · SFO → LHR
· 0:48Quality 86side-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −81%). 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
- 97%
- First lockfrom target selected
- 1.1 s
- Centring, medianaz / el while locked
- 0.48° / 0.35°
- Centring, 90th pctaz / el while locked
- 5.43° / 6.40°
- Tightest field of viewhorizontal
- 6.6°
- Time to 8°from first lock
- 39.9 s
- Time to tightestfrom first lock
- 39.9 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
- 1.21°
- Largest correctionvision vs prediction
- 3.19°
- Zoom steps
- 25
Aircraft & route
- Flight
- UAL948
- Registration
- N81105
- Type
- Boeing 787-9
- Airline
- United
- From
- SFO · San Francisco
- To
- LHR · London
- Ground speed
- 167 kt
- Altitude at closest
- 1,375 ft
- Vertical rate
- —
- Category
- A5
- ICAO hex
- ab0f89
Pass geometry
- Max elevation
- 78.1°
- Elevation at start → end
- 15.9° → 13.2°
- Azimuth at start → end
- 113° ESE → 299° WNW
- Closest-approach azimuth
- 28° NNE
- Minimum slant range
- 417 m
- Heading at closest
- 298° WNW
- Aspect at closest
- side-on (90°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:48 (47.5 s)
- Lock
- 97%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-13j — full 3.4 deg tele for slow planes (limit only above 0.5 deg/s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 24.0 MB · 48.0 s · offset -1.2 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