UAL2177 United
Boeing 737NG 800/W · N78540 · SFO → ?
· 0:53Quality 77side-onDead-zone wrap
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −62%). 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
- 79%
- First lockfrom target selected
- 4.6 s
- Centring, medianaz / el while locked
- 1.49° / 0.44°
- Centring, 90th pctaz / el while locked
- 2.59° / 1.38°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 8.0 s
- Time to tightestfrom first lock
- 18.7 s
- Time at telefield of view ≤ 5.5°
- 12.0 s
- Jitter at teleaz / el, standard deviation
- 0.55° / 0.18°
- Swing at teleaz / el, peak to peak
- 2.06° / 0.75°
- Pan reversalsper 10 s at tele
- 1.7
- Largest pan hopin any 1 s at tele
- 6.87°
- Largest tilt hopin any 1 s at tele
- 1.23°
- Pose error, mediancommand vs camera
- 1.46°
- Largest correctionvision vs prediction
- 1.40°
- Zoom steps
- 51
Aircraft & route
- Flight
- UAL2177
- Registration
- N78540
- Type
- Boeing 737NG 800/W
- Airline
- United
- From
- SFO
- To
- —
- Ground speed
- 303 kt
- Altitude at closest
- 9,975 ft
- Vertical rate
- +3,648 ft/min
- Category
- A3
- ICAO hex
- aaa616
Pass geometry
- Max elevation
- 37.1°
- Elevation at start → end
- 36.0° → 21.2°
- Azimuth at start → end
- 280° W → 210° SSW
- Closest-approach azimuth
- 265° W
- Minimum slant range
- 5.0 km
- Heading at closest
- 184° S
- Aspect at closest
- side-on (81°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- Yes — pan pre-positioned across the stop
- Duration
- 0:53 (53.0 s)
- Lock
- 79%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14b — steady overhead park, zoom travel guard
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 26.5 MB · 53.0 s · offset -1.5 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