UAL573 United
Boeing 737-8 · N37325 · SFO → ?
· 0:27Quality 88side-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −80%). 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
- 74%
- First lockfrom target selected
- 7.0 s
- Centring, medianaz / el while locked
- 0.12° / 0.09°
- Centring, 90th pctaz / el while locked
- 0.51° / 0.37°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 2.4 s
- Time to tightestfrom first lock
- 4.0 s
- Time at telefield of view ≤ 5.5°
- 16.2 s
- Jitter at teleaz / el, standard deviation
- 0.16° / 0.17°
- Swing at teleaz / el, peak to peak
- 0.76° / 0.92°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 1.91°
- Largest tilt hopin any 1 s at tele
- 1.17°
- Pose error, mediancommand vs camera
- 0.87°
- Largest correctionvision vs prediction
- 0.41°
- Zoom steps
- 21
Aircraft & route
- Flight
- UAL573
- Registration
- N37325
- Type
- Boeing 737-8
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 287 kt
- Altitude at closest
- 5,450 ft
- Vertical rate
- +3,200 ft/min
- Category
- A3
- ICAO hex
- a441ac
Pass geometry
- Max elevation
- 16.4°
- Elevation at start → end
- 16.0° → 15.3°
- Azimuth at start → end
- 311° NW → 279° W
- Closest-approach azimuth
- 299° WNW
- Minimum slant range
- 5.6 km
- Heading at closest
- 231° SW
- Aspect at closest
- side-on (68°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:27 (27.1 s)
- Lock
- 74%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14n — vision skyline mask 31x cheaper (loop back to ~15 Hz)
- Commit
- af2a83e
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 13.5 MB · 27.0 s · offset -0.9 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
- -0.16
- 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