skylight.

UAL2179 United

· 0:17Quality 65soft focusside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −83%). 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
63%
First lockfrom target selected
6.2 s
Centring, medianaz / el while locked
0.11° / 0.13°
Centring, 90th pctaz / el while locked
0.26° / 0.87°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
2.3 s
Time to tightestfrom first lock
4.4 s
Time at telefield of view ≤ 5.5°
6.8 s
Jitter at teleaz / el, standard deviation
0.15° / 0.10°
Swing at teleaz / el, peak to peak
0.55° / 0.35°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.51°
Largest tilt hopin any 1 s at tele
0.40°
Pose error, mediancommand vs camera
0.51°
Largest correctionvision vs prediction
2.24°
Zoom steps
22

Aircraft & route

Flight
UAL2179
Registration
—
Type
—
Airline
United
From
—
To
—
Ground speed
293 kt
Altitude at closest
11,525 ft
Vertical rate
0 ft/min
Category
A3
ICAO hex
a0b7df

Pass geometry

Max elevation
21.3°
Elevation at start → end
18.2° → 21.3°
Azimuth at start → end
332° NNW → 344° NNW
Closest-approach azimuth
344° NNW
Minimum slant range
9.7 km
Heading at closest
108° ESE
Aspect at closest
side-on (56°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:17 (17.0 s)
Lock
63%

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
8.4 MB · 17.0 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