skylight.

SWA3995 Southwest Airlines

Boeing 737-8 · N8778Q

· 0:45Quality 87quarteringturned right 15°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −71%). 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
82%
First lockfrom target selected
5.7 s
Centring, medianaz / el while locked
0.11° / 0.10°
Centring, 90th pctaz / el while locked
0.34° / 0.27°
Tightest field of viewhorizontal
3.6°
Time to 8°from first lock
4.0 s
Time to tightestfrom first lock
39.0 s
Time at telefield of view ≤ 5.5°
32.2 s
Jitter at teleaz / el, standard deviation
0.15° / 0.16°
Swing at teleaz / el, peak to peak
1.43° / 0.78°
Pan reversalsper 10 s at tele
0.6
Largest pan hopin any 1 s at tele
3.49°
Largest tilt hopin any 1 s at tele
1.36°
Pose error, mediancommand vs camera
0.69°
Largest correctionvision vs prediction
0.53°
Zoom steps
28

Aircraft & route

Flight
SWA3995
Registration
N8778Q
Type
Boeing 737-8
Airline
Southwest Airlines
From
—
To
—
Ground speed
306 kt
Altitude at closest
12,625 ft
Vertical rate
-512 ft/min
Category
A3
ICAO hex
ac13d6

Pass geometry

Max elevation
62.5°
Elevation at start → end
62.5° → 25.0°
Azimuth at start → end
101° ESE → 141° SE
Closest-approach azimuth
101° ESE
Minimum slant range
4.4 km
Heading at closest
141° SE
Aspect at closest
quartering (39°)
Turn
turned right 15°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:45 (45.0 s)
Lock
82%

Build & tuning

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

Build
2026-10-15q — drive speed latched at the lens position; measured speed bytes only; auto-cal keeps gains
Commit
44f2d6a
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
22.5 MB · 45.0 s · offset -0.8 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
-0.11
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