skylight.

UAL1754 United

· 2:21Quality 81lost lockside-onturned left 24°

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
81%
First lockfrom target selected
9.5 s
Centring, medianaz / el while locked
0.14° / 0.09°
Centring, 90th pctaz / el while locked
0.35° / 0.23°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.1 s
Time to tightestfrom first lock
115.3 s
Time at telefield of view ≤ 5.5°
113.6 s
Jitter at teleaz / el, standard deviation
0.17° / 0.16°
Swing at teleaz / el, peak to peak
0.91° / 1.42°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.44°
Largest tilt hopin any 1 s at tele
1.47°
Pose error, mediancommand vs camera
0.53°
Largest correctionvision vs prediction
1.87°
Zoom steps
24

Aircraft & route

Flight
UAL1754
Registration
—
Type
—
Airline
United
From
—
To
—
Ground speed
244 kt
Altitude at closest
10,900 ft
Vertical rate
-832 ft/min
Category
A3
ICAO hex
a2b7f5

Pass geometry

Max elevation
26.3°
Elevation at start → end
17.8° → 13.8°
Azimuth at start → end
327° NNW → 71° ENE
Closest-approach azimuth
12° NNE
Minimum slant range
7.5 km
Heading at closest
106° ESE
Aspect at closest
side-on (85°)
Turn
turned left 24°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
2:21 (140.7 s)
Lock
81%

Build & tuning

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

Build
2026-10-16d — interleaved A/B (experiment mountPrior)
Commit
221ec3f
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
122.7 MB · 139.4 s · offset -1.0 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
-0.1
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