UAL1259 United
Boeing 737-9 · N37549 · SJC → DEN
· 1:55Quality 93side-onturned left 20°
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −81%). Download
Trace
Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.
—FOV —az —el —pose —
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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
- 89%
- First lockfrom target selected
- 12.0 s
- Centring, medianaz / el while locked
- 0.10° / 0.12°
- Centring, 90th pctaz / el while locked
- 0.24° / 0.28°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 5.0 s
- Time to tightestfrom first lock
- 75.6 s
- Time at telefield of view ≤ 5.5°
- 96.9 s
- Jitter at teleaz / el, standard deviation
- 0.12° / 0.16°
- Swing at teleaz / el, peak to peak
- 0.73° / 0.91°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 1.19°
- Largest tilt hopin any 1 s at tele
- 1.33°
- Pose error, mediancommand vs camera
- 0.48°
- Largest correctionvision vs prediction
- 0.53°
- Zoom steps
- 42
Aircraft & route
- Flight
- UAL1259
- Registration
- N37549
- Type
- Boeing 737-9
- Airline
- United
- From
- SJC · San Jose
- To
- DEN · Denver
- Ground speed
- 292 kt
- Altitude at closest
- 10,875 ft
- Vertical rate
- +896 ft/min
- Category
- A3
- ICAO hex
- a44964
Pass geometry
- Max elevation
- 18.9°
- Elevation at start → end
- 15.9° → 12.0°
- Azimuth at start → end
- 274° W → 194° SSW
- Closest-approach azimuth
- 248° WSW
- Minimum slant range
- 10.2 km
- Heading at closest
- 165° SSE
- Aspect at closest
- side-on (83°)
- Turn
- turned left 20°
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:55 (115.1 s)
- Lock
- 89%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-16a — main b067f99 (review cleanup)
- Commit
- b067f99
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 56.5 MB · 114.0 s · offset -1.7 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