skylight.

SWA853 Southwest Airlines

Boeing 737MAX 8 · N8757L

· 2:12Quality 86side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
98%
First lockfrom target selected
3.0 s
Centring, medianaz / el while locked
0.12° / 0.13°
Centring, 90th pctaz / el while locked
0.33° / 0.37°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
4.5 s
Time to tightestfrom first lock
93.6 s
Time at telefield of view ≤ 5.5°
118.4 s
Jitter at teleaz / el, standard deviation
0.15° / 0.20°
Swing at teleaz / el, peak to peak
0.89° / 1.38°
Pan reversalsper 10 s at tele
0.1
Largest pan hopin any 1 s at tele
5.68°
Largest tilt hopin any 1 s at tele
2.80°
Pose error, mediancommand vs camera
0.67°
Largest correctionvision vs prediction
3.04°
Zoom steps
14

Aircraft & route

Flight
SWA853
Registration
N8757L
Type
Boeing 737MAX 8
Airline
Southwest Airlines
From
—
To
—
Ground speed
284 kt
Altitude at closest
9,775 ft
Vertical rate
+1,856 ft/min
Category
A3
ICAO hex
ac0c41

Pass geometry

Max elevation
53.8°
Elevation at start → end
19.1° → 14.1°
Azimuth at start → end
350° N → 198° SSW
Closest-approach azimuth
276° W
Minimum slant range
3.7 km
Heading at closest
189° S
Aspect at closest
side-on (87°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
2:12 (131.6 s)
Lock
98%

Build & tuning

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

Build
2026-10-16h — lock-first association on (A/B −40% tele gaps)
Commit
dfc3684
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
66.0 MB · 132.0 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
-0.24
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