ASA521 Alaska
Boeing 737-9 · N946AK
· 0:44Quality 91nose/tail
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −79%). 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
- 91%
- First lockfrom target selected
- 4.1 s
- Centring, medianaz / el while locked
- 0.08° / 0.12°
- Centring, 90th pctaz / el while locked
- 0.76° / 0.27°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 4.0 s
- Time to tightestfrom first lock
- 30.4 s
- Time at telefield of view ≤ 5.5°
- 33.6 s
- Jitter at teleaz / el, standard deviation
- 0.20° / 0.16°
- Swing at teleaz / el, peak to peak
- 1.30° / 0.78°
- 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
- 1.07°
- Pose error, mediancommand vs camera
- 0.54°
- Largest correctionvision vs prediction
- 0.55°
- Zoom steps
- 21
Aircraft & route
- Flight
- ASA521
- Registration
- N946AK
- Type
- Boeing 737-9
- Airline
- Alaska
- From
- —
- To
- —
- Ground speed
- 323 kt
- Altitude at closest
- 12,475 ft
- Vertical rate
- 0 ft/min
- Category
- A3
- ICAO hex
- ad237c
Pass geometry
- Max elevation
- 48.1°
- Elevation at start → end
- 48.1° → 20.5°
- Azimuth at start → end
- 121° ESE → 144° SE
- Closest-approach azimuth
- 121° ESE
- Minimum slant range
- 5.1 km
- Heading at closest
- 147° SSE
- Aspect at closest
- nose/tail (25°)
- Turn
- straight (9°)
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:44 (43.6 s)
- Lock
- 91%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-15s — bias fold follows a ramp; no pass below the skyline
- Commit
- cdd2256
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 21.2 MB · 42.9 s · offset -1.3 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