skylight.

UAL506 United

Boeing 777 224ER · N78013

· 1:53Quality 95side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −76%). 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
92%
First lockfrom target selected
3.8 s
Centring, medianaz / el while locked
0.15° / 0.18°
Centring, 90th pctaz / el while locked
0.59° / 0.46°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
0.0 s
Time to tightestfrom first lock
10.2 s
Time at telefield of view ≤ 5.5°
75.8 s
Jitter at teleaz / el, standard deviation
0.26° / 0.22°
Swing at teleaz / el, peak to peak
1.48° / 1.19°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
6.15°
Largest tilt hopin any 1 s at tele
3.23°
Pose error, mediancommand vs camera
0.79°
Largest correctionvision vs prediction
4.05°
Zoom steps
9

Aircraft & route

Flight
UAL506
Registration
N78013
Type
Boeing 777 224ER
Airline
United
From
—
To
—
Ground speed
237 kt
Altitude at closest
11,525 ft
Vertical rate
-64 ft/min
Category
A5
ICAO hex
aa931d

Pass geometry

Max elevation
70.2°
Elevation at start → end
20.2° → 33.4°
Azimuth at start → end
327° NNW → 129° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.8 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
straight (12°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:53 (112.6 s)
Lock
92%

Build & tuning

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

Build
2026-10-15u — driver limits live (tilt range follows the slip)
Commit
82eb706
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
53.8 MB · 110.0 s · offset -1.2 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
-0.03
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