UAL3851 United
Airbus A320 232 · N479UA · FRA → SFO
· 1:23Quality 74lost lockside-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −79%). 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
- 70%
- First lockfrom target selected
- 11.2 s
- Centring, medianaz / el while locked
- 0.12° / 0.10°
- Centring, 90th pctaz / el while locked
- 0.35° / 0.30°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 5.1 s
- Time to tightestfrom first lock
- 60.1 s
- Time at telefield of view ≤ 5.5°
- 60.2 s
- Jitter at teleaz / el, standard deviation
- 0.14° / 0.14°
- Swing at teleaz / el, peak to peak
- 0.74° / 0.66°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 1.28°
- Largest tilt hopin any 1 s at tele
- 1.08°
- Pose error, mediancommand vs camera
- 0.52°
- Largest correctionvision vs prediction
- 2.55°
- Zoom steps
- 42
Aircraft & route
- Flight
- UAL3851
- Registration
- N479UA
- Type
- Airbus A320 232
- Airline
- United
- From
- FRA · Frankfurt am Main
- To
- SFO · San Francisco
- Ground speed
- 232 kt
- Altitude at closest
- 11,300 ft
- Vertical rate
- -1,088 ft/min
- Category
- A3
- ICAO hex
- a5e44c
Pass geometry
- Max elevation
- 29.1°
- Elevation at start → end
- 29.0° → 13.8°
- Azimuth at start → end
- 9° N → 73° ENE
- Closest-approach azimuth
- 14° NNE
- Minimum slant range
- 7.1 km
- Heading at closest
- 109° ESE
- Aspect at closest
- side-on (85°)
- Turn
- straight (0°)
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:23 (83.0 s)
- Lock
- 70%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-15u — driver limits live (tilt range follows the slip)
- Commit
- 82eb706
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 40.7 MB · 82.3 s · offset -1.2 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