UAL2831 United
Boeing 737-9 · N37538 · SFO → ?
· 1:22Quality 91clip shortside-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −86%). 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
- 81%
- First lockfrom target selected
- 11.2 s
- Centring, medianaz / el while locked
- 0.11° / 0.12°
- Centring, 90th pctaz / el while locked
- 0.33° / 0.28°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 5.6 s
- Time to tightestfrom first lock
- 67.5 s
- Time at telefield of view ≤ 5.5°
- 62.9 s
- Jitter at teleaz / el, standard deviation
- 0.13° / 0.15°
- Swing at teleaz / el, peak to peak
- 0.69° / 0.76°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 1.67°
- Largest tilt hopin any 1 s at tele
- 1.36°
- Pose error, mediancommand vs camera
- 0.68°
- Largest correctionvision vs prediction
- 1.50°
- Zoom steps
- 40
Aircraft & route
- Flight
- UAL2831
- Registration
- N37538
- Type
- Boeing 737-9
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 278 kt
- Altitude at closest
- 7,400 ft
- Vertical rate
- +2,240 ft/min
- Category
- A3
- ICAO hex
- a44940
Pass geometry
- Max elevation
- 19.3°
- Elevation at start → end
- 14.9° → 14.8°
- Azimuth at start → end
- 289° WNW → 209° SSW
- Closest-approach azimuth
- 248° WSW
- Minimum slant range
- 6.6 km
- Heading at closest
- 174° S
- Aspect at closest
- side-on (74°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:22 (81.6 s)
- Lock
- 81%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-16e — A/B mountPrior + candidate diagnostics
- Commit
- ffe4b92
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 45.2 MB · 58.6 s · offset -0.5 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
- -0.1
- 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