skylight.

SWA4319 Southwest Airlines

Boeing 737 MAX 8 · N9021F · SFO → ?

· 1:44Quality 92side-onturned left 27°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −76%). 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
85%
First lockfrom target selected
11.9 s
Centring, medianaz / el while locked
0.12° / 0.11°
Centring, 90th pctaz / el while locked
0.39° / 0.26°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
5.6 s
Time to tightestfrom first lock
90.5 s
Time at telefield of view ≤ 5.5°
83.4 s
Jitter at teleaz / el, standard deviation
0.20° / 0.16°
Swing at teleaz / el, peak to peak
1.29° / 1.02°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
3.35°
Largest tilt hopin any 1 s at tele
1.59°
Pose error, mediancommand vs camera
0.61°
Largest correctionvision vs prediction
0.42°
Zoom steps
40

Aircraft & route

Flight
SWA4319
Registration
N9021F
Type
Boeing 737 MAX 8
Airline
Southwest Airlines
From
SFO
To
—
Ground speed
294 kt
Altitude at closest
7,325 ft
Vertical rate
+2,112 ft/min
Category
A3
ICAO hex
ac791b

Pass geometry

Max elevation
27.3°
Elevation at start → end
20.5° → 14.9°
Azimuth at start → end
308° NW → 193° SSW
Closest-approach azimuth
267° W
Minimum slant range
4.9 km
Heading at closest
183° S
Aspect at closest
side-on (84°)
Turn
turned left 27°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:44 (103.6 s)
Lock
85%

Build & tuning

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

Build
2026-10-15p — selection hysteresis; auto-cal drops stale bias
Commit
b8aa462
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
51.0 MB · 103.1 s · offset -1.1 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
-0.16
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