skylight.

SIA31 Singapore Airlines

Airbus A350 941 · 9V-SMW · SFO → SIN

· 0:59Quality 72nose/tailOverhead

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
56%
First lockfrom target selected
15.2 s
Centring, medianaz / el while locked
0.27° / 0.34°
Centring, 90th pctaz / el while locked
1.84° / 2.38°
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
1.07°
Largest correctionvision vs prediction
0.48°
Zoom steps
4

Aircraft & route

Flight
SIA31
Registration
9V-SMW
Type
Airbus A350 941
Airline
Singapore Airlines
From
SFO · San Francisco
To
SIN · Singapore
Ground speed
174 kt
Altitude at closest
1,325 ft
Vertical rate
+2,304 ft/min
Category
A5
ICAO hex
76cdb7

Pass geometry

Max elevation
83.5°
Elevation at start → end
2.2° → 13.5°
Azimuth at start → end
115° ESE → 299° WNW
Closest-approach azimuth
28° NNE
Minimum slant range
436 m
Heading at closest
297° WNW
Aspect at closest
nose/tail (6°)
Turn
straight (4°)
Departure
Yes — climbing out after take-off
Zenith pass
Yes — camera flipped over the top
Dead-zone wrap
No
Duration
0:59 (58.8 s)
Lock
56%

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
29.6 MB · 59.0 s · offset -1.1 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