skylight.

SWA4311 Southwest Airlines

Boeing 737NG 7H4/W · N906WN · SFO → ?

· 0:43Quality 77lost lockside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −67%). Download

Trace

Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.

—FOV —az —el —pose —
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
72%
First lockfrom target selected
4.5 s
Centring, medianaz / el while locked
0.25° / 0.41°
Centring, 90th pctaz / el while locked
1.69° / 3.96°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
5.9 s
Time to tightestfrom first lock
8.2 s
Time at telefield of view ≤ 5.5°
16.2 s
Jitter at teleaz / el, standard deviation
0.49° / 0.32°
Swing at teleaz / el, peak to peak
2.29° / 1.36°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
7.20°
Largest tilt hopin any 1 s at tele
3.62°
Pose error, mediancommand vs camera
1.73°
Largest correctionvision vs prediction
3.04°
Zoom steps
54

Aircraft & route

Flight
SWA4311
Registration
N906WN
Type
Boeing 737NG 7H4/W
Airline
Southwest Airlines
From
SFO
To
—
Ground speed
265 kt
Altitude at closest
6,175 ft
Vertical rate
+2,560 ft/min
Category
A3
ICAO hex
ac8777

Pass geometry

Max elevation
45.8°
Elevation at start → end
19.2° → 40.1°
Azimuth at start → end
351° N → 244° WSW
Closest-approach azimuth
279° W
Minimum slant range
2.6 km
Heading at closest
195° SSW
Aspect at closest
side-on (84°)
Turn
straight (4°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:43 (42.6 s)
Lock
72%

Build & tuning

The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.

Build
2026-10-16a — main b067f99 (review cleanup)
Commit
b067f99
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
21.0 MB · 42.5 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
-0.03
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