skylight.

UAL35 United

Boeing 777 222ER · N218UA · SFO → KIX

· 0:54Quality 75nose/tailOverhead

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −78%). 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
71%
First lockfrom target selected
9.0 s
Centring, medianaz / el while locked
1.23° / 0.86°
Centring, 90th pctaz / el while locked
9.93° / 11.77°
Tightest field of viewhorizontal
3.5°
Time to 8°from first lock
39.9 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
2.0 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
1.76°
Largest correctionvision vs prediction
1.67°
Zoom steps
42

Aircraft & route

Flight
UAL35
Registration
N218UA
Type
Boeing 777 222ER (B772)
Airline
United
From
SFO · San Francisco
To
KIX · Osaka
Ground speed
192 kt
Altitude at closest
1,125 ft
Vertical rate
+2,688 ft/min
Category
A5
ICAO hex
a1d8fd

Pass geometry

Max elevation
81.6°
Elevation at start → end
0.3° → 13.2°
Azimuth at start → end
116° ESE → 299° WNW
Closest-approach azimuth
21° NNE
Minimum slant range
368 m
Heading at closest
298° WNW
Aspect at closest
nose/tail (6°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
Yes — camera flipped over the top
Dead-zone wrap
No
Duration
0:54 (53.6 s)
Lock
71%

Build & tuning

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

Build
2026-10-14d — park, zoom guard v2, visionMiss log
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
27.0 MB · 54.0 s · offset -1.7 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