skylight.

UAL673 United

Boeing 787 9 · N36962

· 3:18Quality 93side-onturned right 16°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −79%). 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
84%
First lockfrom target selected
8.8 s
Centring, medianaz / el while locked
0.13° / 0.12°
Centring, 90th pctaz / el while locked
0.54° / 0.39°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
6.6 s
Time to tightestfrom first lock
12.1 s
Time at telefield of view ≤ 5.5°
128.4 s
Jitter at teleaz / el, standard deviation
0.20° / 0.19°
Swing at teleaz / el, peak to peak
2.29° / 1.87°
Pan reversalsper 10 s at tele
0.3
Largest pan hopin any 1 s at tele
6.76°
Largest tilt hopin any 1 s at tele
3.25°
Pose error, mediancommand vs camera
0.45°
Largest correctionvision vs prediction
2.04°
Zoom steps
45

Aircraft & route

Flight
UAL673
Registration
N36962
Type
Boeing 787 9 (B789)
Airline
United
From
—
To
—
Ground speed
295 kt
Altitude at closest
11,500 ft
Vertical rate
-64 ft/min
Category
A5
ICAO hex
a43100

Pass geometry

Max elevation
70.2°
Elevation at start → end
17.8° → 9.3°
Azimuth at start → end
326° NNW → 146° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.7 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
turned right 16°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
3:18 (197.8 s)
Lock
84%

Build & tuning

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

Build
2026-10-16h — lock-first association on (A/B −40% tele gaps)
Commit
dfc3684
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
98.3 MB · 198.0 s · offset -1.4 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
-0.06
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