skylight.

SWA3130 Southwest Airlines

Boeing 737NG 8H4/W · N8691A

· 0:21Quality 59lost lockside-onturned left 22°

3D replay

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
40%
First lockfrom target selected
8.9 s
Centring, medianaz / el while locked
0.26° / 0.14°
Centring, 90th pctaz / el while locked
0.73° / 0.40°
Tightest field of viewhorizontal
6.2°
Time to 8°from first lock
11.0 s
Time to tightestfrom first lock
11.6 s
Time at telefield of view ≤ 5.5°
0.0 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
—
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
0.73°
Largest correctionvision vs prediction
1.31°
Zoom steps
18

Aircraft & route

Flight
SWA3130
Registration
N8691A
Type
Boeing 737NG 8H4/W
Airline
Southwest Airlines
From
—
To
—
Ground speed
326 kt
Altitude at closest
10,200 ft
Vertical rate
+64 ft/min
Category
A3
ICAO hex
abf2c2

Pass geometry

Max elevation
21.0°
Elevation at start → end
19.0° → 21.0°
Azimuth at start → end
308° NW → 286° WNW
Closest-approach azimuth
286° WNW
Minimum slant range
8.7 km
Heading at closest
184° S
Aspect at closest
side-on (78°)
Turn
turned left 22°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:21 (20.5 s)
Lock
40%

Build & tuning

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

Build
2026-10-13i — slower zoom ladder (one rung, 1.5 s)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
10.5 MB · 21.0 s · offset -1.5 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