skylight.

CAL5346 China Airlines

Boeing 777-200LR · B-18781 · SFO → ATL

· 1:21Quality 79nose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −61%). 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
59%
First lockfrom target selected
24.4 s
Centring, medianaz / el while locked
0.42° / 0.34°
Centring, 90th pctaz / el while locked
4.53° / 3.05°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
37.4 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
1.1 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
1.02°
Largest correctionvision vs prediction
4.66°
Zoom steps
59

Aircraft & route

Flight
CAL5346
Registration
B-18781
Type
Boeing 777-200LR (B77L)
Airline
China Airlines
From
SFO · San Francisco
To
ATL · Atlanta
Ground speed
180 kt
Altitude at closest
1,375 ft
Vertical rate
+2,240 ft/min
Category
A5
ICAO hex
8990a6

Pass geometry

Max elevation
84.4°
Elevation at start → end
0.2° → 12.0°
Azimuth at start → end
116° ESE → 298° WNW
Closest-approach azimuth
28° NNE
Minimum slant range
447 m
Heading at closest
297° WNW
Aspect at closest
nose/tail (6°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:21 (80.7 s)
Lock
59%

Build & tuning

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

Build
2026-10-16g — A/B lockFirst (mount prior on)
Commit
9bdc356
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
40.5 MB · 81.0 s · offset -1.5 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
-0.1
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