SKW5938 SkyWest
Embraer EMB-175 LR · N121SY · FCA → SFO
· 2:18Quality 80lost lockside-onturned right 18°
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −75%). 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
- 64%
- First lockfrom target selected
- 17.8 s
- Centring, medianaz / el while locked
- 0.30° / 0.15°
- Centring, 90th pctaz / el while locked
- 1.71° / 0.37°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 8.2 s
- Time to tightestfrom first lock
- 111.1 s
- Time at telefield of view ≤ 5.5°
- 59.6 s
- Jitter at teleaz / el, standard deviation
- 0.72° / 0.23°
- Swing at teleaz / el, peak to peak
- 3.28° / 1.36°
- Pan reversalsper 10 s at tele
- 0.3
- Largest pan hopin any 1 s at tele
- 7.66°
- Largest tilt hopin any 1 s at tele
- 1.73°
- Pose error, mediancommand vs camera
- 0.62°
- Largest correctionvision vs prediction
- 1.14°
- Zoom steps
- 59
Aircraft & route
- Flight
- SKW5938
- Registration
- N121SY
- Type
- Embraer EMB-175 LR
- Airline
- SkyWest
- From
- FCA · Kalispell
- To
- SFO · San Francisco
- Ground speed
- 299 kt
- Altitude at closest
- 9,400 ft
- Vertical rate
- -1,600 ft/min
- Category
- A3
- ICAO hex
- a05910
Pass geometry
- Max elevation
- 65.9°
- Elevation at start → end
- 17.9° → 12.4°
- Azimuth at start → end
- 327° NNW → 140° SE
- Closest-approach azimuth
- 49° NE
- Minimum slant range
- 3.1 km
- Heading at closest
- 140° SE
- Aspect at closest
- side-on (89°)
- Turn
- turned right 18°
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 2:18 (137.7 s)
- Lock
- 64%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14i — zoom sigma grows after lock loss (0.1°/s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 69.0 MB · 138.0 s · offset -1.4 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
- 0.59
- 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