skylight.

UAL342 United

Boeing 757 324/W · N75853

· 1:35Quality 74low zoomside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −55%). 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
87%
First lockfrom target selected
5.4 s
Centring, medianaz / el while locked
0.77° / 0.54°
Centring, 90th pctaz / el while locked
3.06° / 1.43°
Tightest field of viewhorizontal
10.8°
Time to 8°from first lock
—
Time to tightestfrom first lock
0.0 s
Time at telefield of view ≤ 5.5°
0.0 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
—
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
0.91°
Largest correctionvision vs prediction
0.85°
Zoom steps
0

Aircraft & route

Flight
UAL342
Registration
N75853
Type
Boeing 757 324/W
Airline
United
From
—
To
—
Ground speed
281 kt
Altitude at closest
11,150 ft
Vertical rate
0 ft/min
Category
A4
ICAO hex
aa3ae4

Pass geometry

Max elevation
69.4°
Elevation at start → end
21.1° → 33.4°
Azimuth at start → end
328° NNW → 125° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.6 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:35 (95.3 s)
Lock
87%

Build & tuning

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

Build
2026-10-13e — revert framing sigma hold
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
47.7 MB · 95.0 s · offset -1.0 s
pursuit
velocity
maxLeadSec
3
panLatencySec
0.6
tiltLatencySec
0.4
rippleDeg
0.5
rippleTeleDeg
0.25
rateFloorDegPerDps
2.5
rateFloorMaxDeg
12
lockedSigmaDeg
0.35
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