skylight.

UAL2281 United

Airbus A320 232 · N488UA · SFO → ?

· 1:25Quality 69lost lockside-onturned left 26°Dead-zone wrap

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −81%). 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
64%
First lockfrom target selected
11.3 s
Centring, medianaz / el while locked
0.07° / 0.09°
Centring, 90th pctaz / el while locked
0.20° / 0.24°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.1 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
55.6 s
Jitter at teleaz / el, standard deviation
0.10° / 0.13°
Swing at teleaz / el, peak to peak
0.65° / 0.64°
Pan reversalsper 10 s at tele
0.2
Largest pan hopin any 1 s at tele
1.48°
Largest tilt hopin any 1 s at tele
0.61°
Pose error, mediancommand vs camera
0.60°
Largest correctionvision vs prediction
1.03°
Zoom steps
40

Aircraft & route

Flight
UAL2281
Registration
N488UA
Type
Airbus A320 232
Airline
United
From
SFO
To
—
Ground speed
288 kt
Altitude at closest
10,800 ft
Vertical rate
+1,984 ft/min
Category
A3
ICAO hex
a60814

Pass geometry

Max elevation
17.3°
Elevation at start → end
17.3° → 12.2°
Azimuth at start → end
222° SW → 169° SSE
Closest-approach azimuth
222° SW
Minimum slant range
11.2 km
Heading at closest
156° SSE
Aspect at closest
side-on (66°)
Turn
turned left 26°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
1:25 (84.6 s)
Lock
64%

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
41.6 MB · 84.0 s · offset -0.9 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