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UAL1116 United

Boeing 737-8 · N37295 · SFO → ?

· 0:40Quality 67nose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −70%). 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
51%
First lockfrom target selected
9.9 s
Centring, medianaz / el while locked
0.15° / 0.28°
Centring, 90th pctaz / el while locked
0.44° / 0.54°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
7.1 s
Time to tightestfrom first lock
21.5 s
Time at telefield of view ≤ 5.5°
12.4 s
Jitter at teleaz / el, standard deviation
0.15° / 0.33°
Swing at teleaz / el, peak to peak
0.55° / 1.26°
Pan reversalsper 10 s at tele
3.2
Largest pan hopin any 1 s at tele
0.73°
Largest tilt hopin any 1 s at tele
1.28°
Pose error, mediancommand vs camera
0.35°
Largest correctionvision vs prediction
0.45°
Zoom steps
20

Aircraft & route

Flight
UAL1116
Registration
N37295
Type
Boeing 737-8
Airline
United
From
SFO
To
—
Ground speed
286 kt
Altitude at closest
7,600 ft
Vertical rate
+3,008 ft/min
Category
A3
ICAO hex
a43eea

Pass geometry

Max elevation
30.1°
Elevation at start → end
30.1° → 16.3°
Azimuth at start → end
193° SSW → 180° S
Closest-approach azimuth
193° SSW
Minimum slant range
4.7 km
Heading at closest
174° S
Aspect at closest
nose/tail (18°)
Turn
straight (9°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:40 (40.2 s)
Lock
51%

Build & tuning

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

Build
2026-10-14g — vision expected spot at frame time, departure pre-zoom, focus from profile, damped lead learner
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
20.0 MB · 40.0 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
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