UAL574 United
Boeing 737-9 · N37547 · SFO → ?
· 0:33Quality 86side-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −59%). 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
- 83%
- First lockfrom target selected
- 4.1 s
- Centring, medianaz / el while locked
- 0.59° / 0.24°
- Centring, 90th pctaz / el while locked
- 2.41° / 0.71°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 3.9 s
- Time to tightestfrom first lock
- 5.9 s
- Time at telefield of view ≤ 5.5°
- 11.6 s
- Jitter at teleaz / el, standard deviation
- 0.46° / 0.30°
- Swing at teleaz / el, peak to peak
- 1.76° / 1.23°
- Pan reversalsper 10 s at tele
- 1.7
- Largest pan hopin any 1 s at tele
- 4.67°
- Largest tilt hopin any 1 s at tele
- 2.15°
- Pose error, mediancommand vs camera
- 1.12°
- Largest correctionvision vs prediction
- 0.44°
- Zoom steps
- 21
Aircraft & route
- Flight
- UAL574
- Registration
- N37547
- Type
- Boeing 737-9
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 296 kt
- Altitude at closest
- 8,150 ft
- Vertical rate
- +2,240 ft/min
- Category
- A3
- ICAO hex
- a44962
Pass geometry
- Max elevation
- 30.4°
- Elevation at start → end
- 19.8° → 29.8°
- Azimuth at start → end
- 308° NW → 251° WSW
- Closest-approach azimuth
- 262° W
- Minimum slant range
- 4.9 km
- Heading at closest
- 178° S
- Aspect at closest
- side-on (84°)
- Turn
- straight (6°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:33 (33.0 s)
- Lock
- 83%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-13i — slower zoom ladder (one rung, 1.5 s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 16.5 MB · 33.0 s · offset -1.1 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