SKW939E SkyWest
Embraer EMB-175 LR · N189SY · SFO → ?
· 1:16Quality 91side-onturned 18°Dead-zone wrap
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −69%). 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
- 81%
- First lockfrom target selected
- 6.5 s
- Centring, medianaz / el while locked
- 0.37° / 0.21°
- Centring, 90th pctaz / el while locked
- 1.11° / 0.66°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 4.2 s
- Time to tightestfrom first lock
- 55.6 s
- Time at telefield of view ≤ 5.5°
- 12.5 s
- Jitter at teleaz / el, standard deviation
- 0.49° / 0.35°
- Swing at teleaz / el, peak to peak
- 1.52° / 1.44°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 4.31°
- Largest tilt hopin any 1 s at tele
- 2.29°
- Pose error, mediancommand vs camera
- 1.40°
- Largest correctionvision vs prediction
- 0.80°
- Zoom steps
- 41
Aircraft & route
- Flight
- SKW939E
- Registration
- N189SY
- Type
- Embraer EMB-175 LR
- Airline
- SkyWest
- From
- SFO
- To
- —
- Ground speed
- 298 kt
- Altitude at closest
- 8,800 ft
- Vertical rate
- +2,432 ft/min
- Category
- A3
- ICAO hex
- a163c2
Pass geometry
- Max elevation
- 39.4°
- Elevation at start → end
- 18.9° → 23.9°
- Azimuth at start → end
- 331° NNW → 213° SSW
- Closest-approach azimuth
- 269° W
- Minimum slant range
- 4.2 km
- Heading at closest
- 185° S
- Aspect at closest
- side-on (84°)
- Turn
- turned 18°
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- Yes — pan pre-positioned across the stop
- Duration
- 1:16 (75.9 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
- 2026-10-14e — feedforward in head axes
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 38.0 MB · 76.0 s · offset -1.7 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