skylight.

UAL2478 United

Airbus A319 131 · N811UA

· 2:25Quality 90side-onturned right 45°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −79%). 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
95%
First lockfrom target selected
7.9 s
Centring, medianaz / el while locked
0.09° / 0.11°
Centring, 90th pctaz / el while locked
0.24° / 0.29°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
8.0 s
Time to tightestfrom first lock
79.1 s
Time at telefield of view ≤ 5.5°
121.9 s
Jitter at teleaz / el, standard deviation
0.16° / 0.15°
Swing at teleaz / el, peak to peak
0.97° / 0.92°
Pan reversalsper 10 s at tele
0.2
Largest pan hopin any 1 s at tele
6.34°
Largest tilt hopin any 1 s at tele
1.88°
Pose error, mediancommand vs camera
0.59°
Largest correctionvision vs prediction
1.65°
Zoom steps
43

Aircraft & route

Flight
UAL2478
Registration
N811UA
Type
Airbus A319 131
Airline
United
From
—
To
—
Ground speed
254 kt
Altitude at closest
11,500 ft
Vertical rate
0 ft/min
Category
A3
ICAO hex
ab0ed6

Pass geometry

Max elevation
69.8°
Elevation at start → end
41.2° → 12.0°
Azimuth at start → end
339° NNW → 147° SSE
Closest-approach azimuth
50° NE
Minimum slant range
3.8 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
turned right 45°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
2:25 (144.6 s)
Lock
95%

Build & tuning

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

Build
2026-10-16g — A/B lockFirst (mount prior on)
Commit
9bdc356
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
72.5 MB · 145.0 s · offset -1.5 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