skylight.

SWA4868 Southwest Airlines

Boeing 737NG 800/W · N8534Z · SFO → ?

· 0:37Quality 56lost lockside-onturned left 20°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −42%). 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
31%
First lockfrom target selected
6.7 s
Centring, medianaz / el while locked
0.48° / 0.51°
Centring, 90th pctaz / el while locked
2.60° / 11.51°
Tightest field of viewhorizontal
4.2°
Time to 8°from first lock
27.5 s
Time to tightestfrom first lock
29.5 s
Time at telefield of view ≤ 5.5°
0.8 s
Jitter at teleaz / el, standard deviation
0.03° / 0.13°
Swing at teleaz / el, peak to peak
0.08° / 0.36°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
1.37°
Largest correctionvision vs prediction
0.16°
Zoom steps
33

Aircraft & route

Flight
SWA4868
Registration
N8534Z
Type
Boeing 737NG 800/W
Airline
Southwest Airlines
From
SFO
To
—
Ground speed
299 kt
Altitude at closest
9,325 ft
Vertical rate
+2,880 ft/min
Category
A3
ICAO hex
abb579

Pass geometry

Max elevation
21.9°
Elevation at start → end
14.6° → 21.9°
Azimuth at start → end
293° WNW → 254° WSW
Closest-approach azimuth
254° WSW
Minimum slant range
7.7 km
Heading at closest
165° SSE
Aspect at closest
side-on (89°)
Turn
turned left 20°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:37 (36.6 s)
Lock
31%

Build & tuning

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

Build
2026-10-14k — loop integrates real tick time; aim lead −0.2 s
Commit
33c2b35-k
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
18.5 MB · 37.0 s · offset -1.6 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
-0.2
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