skylight.

AAL2387 American Airlines

Airbus A321 231SL · N900UW · SFO → ?

· 0:35Quality 69low zoomquarteringDead-zone wrap

3D replay

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
86%
First lockfrom target selected
5.6 s
Centring, medianaz / el while locked
0.28° / 0.14°
Centring, 90th pctaz / el while locked
1.53° / 0.39°
Tightest field of viewhorizontal
10.8°
Time to 8°from first lock
—
Time to tightestfrom first lock
0.0 s
Time at telefield of view ≤ 5.5°
0.0 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
—
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
0.45°
Largest correctionvision vs prediction
0.65°
Zoom steps
4

Aircraft & route

Flight
AAL2387
Registration
N900UW
Type
Airbus A321 231SL
Airline
American Airlines
From
SFO
To
—
Ground speed
290 kt
Altitude at closest
6,850 ft
Vertical rate
+1,792 ft/min
Category
A3
ICAO hex
ac7103

Pass geometry

Max elevation
21.4°
Elevation at start → end
21.4° → 14.5°
Azimuth at start → end
218° SW → 197° SSW
Closest-approach azimuth
218° SW
Minimum slant range
5.8 km
Heading at closest
176° S
Aspect at closest
quartering (43°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
0:35 (35.2 s)
Lock
86%

Build & tuning

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

Build
2026-10-13g — debanding (archive s2 + live shader)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
13.6 MB · 33.0 s · offset -1.5 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