UAL3878 United
Boeing 787-9 · N61115
· 0:56Quality 81nose/tail
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −72%). 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
- 88%
- First lockfrom target selected
- 5.3 s
- Centring, medianaz / el while locked
- 0.49° / 0.43°
- Centring, 90th pctaz / el while locked
- 4.69° / 1.83°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 39.0 s
- Time to tightestfrom first lock
- —
- Time at telefield of view ≤ 5.5°
- 3.0 s
- Jitter at teleaz / el, standard deviation
- 0.15° / 0.14°
- Swing at teleaz / el, peak to peak
- 0.52° / 0.38°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 0.70°
- Largest tilt hopin any 1 s at tele
- 1.04°
- Pose error, mediancommand vs camera
- 1.61°
- Largest correctionvision vs prediction
- 3.15°
- Zoom steps
- 37
Aircraft & route
- Flight
- UAL3878
- Registration
- N61115
- Type
- Boeing 787-9
- Airline
- United
- From
- —
- To
- —
- Ground speed
- 175 kt
- Altitude at closest
- 2,375 ft
- Vertical rate
- —
- Category
- A5
- ICAO hex
- a7f50e
Pass geometry
- Max elevation
- 85.0°
- Elevation at start → end
- 14.4° → 13.7°
- Azimuth at start → end
- 115° ESE → 299° WNW
- Closest-approach azimuth
- 23° NNE
- Minimum slant range
- 707 m
- Heading at closest
- 298° WNW
- Aspect at closest
- nose/tail (8°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:56 (55.7 s)
- Lock
- 88%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14k — loop integrates real tick time; aim lead −0.2 s
- Commit
- 33c2b35-k
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 27.5 MB · 55.0 s · offset -0.8 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
- -0.28
- 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