skylight.

SWA3399 Southwest Airlines

Boeing 737-8 · N8929S · SFO → ?

· 1:18Quality 92side-onturned left 27°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −58%). 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
79%
First lockfrom target selected
12.3 s
Centring, medianaz / el while locked
0.12° / 0.10°
Centring, 90th pctaz / el while locked
0.70° / 0.34°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
5.2 s
Time to tightestfrom first lock
18.9 s
Time at telefield of view ≤ 5.5°
58.2 s
Jitter at teleaz / el, standard deviation
0.35° / 0.19°
Swing at teleaz / el, peak to peak
2.72° / 1.36°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
3.81°
Largest tilt hopin any 1 s at tele
1.47°
Pose error, mediancommand vs camera
0.88°
Largest correctionvision vs prediction
0.59°
Zoom steps
45

Aircraft & route

Flight
SWA3399
Registration
N8929S
Type
Boeing 737-8
Airline
Southwest Airlines
From
SFO
To
—
Ground speed
307 kt
Altitude at closest
10,025 ft
Vertical rate
+2,816 ft/min
Category
A3
ICAO hex
ac5066

Pass geometry

Max elevation
40.6°
Elevation at start → end
34.4° → 19.3°
Azimuth at start → end
296° WNW → 187° S
Closest-approach azimuth
258° WSW
Minimum slant range
4.7 km
Heading at closest
175° S
Aspect at closest
side-on (83°)
Turn
turned left 27°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:18 (77.6 s)
Lock
79%

Build & tuning

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

Build
2026-10-15s — bias fold follows a ramp; no pass below the skyline
Commit
cdd2256
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
39.0 MB · 78.0 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
-0.16
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