ASA657 Alaska
Boeing 737-9 · N948AK · JFK → SFO
· 2:16Quality 95side-onturned right 16°
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
- 92%
- First lockfrom target selected
- 6.9 s
- Centring, medianaz / el while locked
- 0.18° / 0.13°
- Centring, 90th pctaz / el while locked
- 0.50° / 0.33°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 11.2 s
- Time to tightestfrom first lock
- 92.0 s
- Time at telefield of view ≤ 5.5°
- 84.1 s
- Jitter at teleaz / el, standard deviation
- 0.30° / 0.18°
- Swing at teleaz / el, peak to peak
- 1.97° / 1.15°
- Pan reversalsper 10 s at tele
- 0.2
- Largest pan hopin any 1 s at tele
- 7.56°
- Largest tilt hopin any 1 s at tele
- 2.11°
- Pose error, mediancommand vs camera
- 0.66°
- Largest correctionvision vs prediction
- 0.78°
- Zoom steps
- 28
Aircraft & route
- Flight
- ASA657
- Registration
- N948AK
- Type
- Boeing 737-9
- Airline
- Alaska
- From
- JFK · New York
- To
- SFO · San Francisco
- Ground speed
- 341 kt
- Altitude at closest
- 12,600 ft
- Vertical rate
- -640 ft/min
- Category
- A3
- ICAO hex
- ad2aea
Pass geometry
- Max elevation
- 72.1°
- Elevation at start → end
- 27.2° → 13.3°
- Azimuth at start → end
- 329° NNW → 148° SSE
- Closest-approach azimuth
- 48° NE
- Minimum slant range
- 4.0 km
- Heading at closest
- 140° SE
- Aspect at closest
- side-on (88°)
- Turn
- turned right 16°
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 2:16 (136.3 s)
- Lock
- 92%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-14l — vision lock coasts with the plane; a zoom ends a focus drive
- Commit
- f5b573a
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 68.5 MB · 137.0 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
- -0.22
- 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