skylight.

UAL342 United

Boeing 737NG 824/W · N37273 · SFO → ?

· 1:29Quality 82side-onturned 26°Dead-zone wrap

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −58%). 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
56%
First lockfrom target selected
7.6 s
Centring, medianaz / el while locked
0.97° / 0.27°
Centring, 90th pctaz / el while locked
5.09° / 1.05°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
4.4 s
Time to tightestfrom first lock
7.7 s
Time at telefield of view ≤ 5.5°
17.8 s
Jitter at teleaz / el, standard deviation
0.81° / 0.40°
Swing at teleaz / el, peak to peak
2.97° / 1.99°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
5.22°
Largest tilt hopin any 1 s at tele
3.42°
Pose error, mediancommand vs camera
1.13°
Largest correctionvision vs prediction
1.64°
Zoom steps
78

Aircraft & route

Flight
UAL342
Registration
N37273
Type
Boeing 737NG 824/W
Airline
United
From
SFO
To
—
Ground speed
297 kt
Altitude at closest
8,425 ft
Vertical rate
+3,456 ft/min
Category
A3
ICAO hex
a43ea2

Pass geometry

Max elevation
40.9°
Elevation at start → end
19.3° → 19.3°
Azimuth at start → end
336° NNW → 206° SSW
Closest-approach azimuth
266° W
Minimum slant range
4.0 km
Heading at closest
183° S
Aspect at closest
side-on (83°)
Turn
turned 26°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
1:29 (88.7 s)
Lock
56%

Build & tuning

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

Build
2026-10-14f — camera profile, head-axes control, speed floor, park from profile, learned lead
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
44.2 MB · 89.0 s · offset -1.1 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
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