ASA657 Alaska
Boeing 737NG 8FH/W · N549AS · JFK → SFO
· 0:55Quality 91side-on
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −70%). 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
- 84%
- First lockfrom target selected
- 7.5 s
- Centring, medianaz / el while locked
- 0.43° / 0.36°
- Centring, 90th pctaz / el while locked
- 1.21° / 1.07°
- Tightest field of viewhorizontal
- 4.1°
- Time to 8°from first lock
- 2.3 s
- Time to tightestfrom first lock
- 6.3 s
- Time at telefield of view ≤ 5.5°
- 12.4 s
- Jitter at teleaz / el, standard deviation
- 0.18° / 0.18°
- Swing at teleaz / el, peak to peak
- 0.82° / 0.90°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 3.22°
- Largest tilt hopin any 1 s at tele
- 1.89°
- Pose error, mediancommand vs camera
- 0.98°
- Largest correctionvision vs prediction
- 2.26°
- Zoom steps
- 23
Aircraft & route
- Flight
- ASA657
- Registration
- N549AS
- Type
- Boeing 737NG 8FH/W
- Airline
- Alaska
- From
- JFK · New York
- To
- SFO · San Francisco
- Ground speed
- 353 kt
- Altitude at closest
- 12,450 ft
- Vertical rate
- -640 ft/min
- Category
- A3
- ICAO hex
- a6f96c
Pass geometry
- Max elevation
- 71.7°
- Elevation at start → end
- 26.3° → 57.9°
- Azimuth at start → end
- 329° NNW → 109° ESE
- Closest-approach azimuth
- 48° NE
- Minimum slant range
- 4.0 km
- Heading at closest
- 140° SE
- Aspect at closest
- side-on (88°)
- Turn
- straight (2°)
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 0:55 (54.7 s)
- Lock
- 84%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-13j — full 3.4 deg tele for slow planes (limit only above 0.5 deg/s)
- Commit
- 181d1fa+wip
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 27.0 MB · 54.0 s · offset -0.9 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