skylight.

APZ111 Air Premiea

ICN → SFO

· 0:23Quality 78quartering

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
75%
First lockfrom target selected
5.3 s
Centring, medianaz / el while locked
0.19° / 0.19°
Centring, 90th pctaz / el while locked
7.70° / 0.97°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
7.8 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
9.4 s
Jitter at teleaz / el, standard deviation
0.16° / 0.18°
Swing at teleaz / el, peak to peak
0.60° / 0.74°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
2.34°
Largest tilt hopin any 1 s at tele
1.21°
Pose error, mediancommand vs camera
1.06°
Largest correctionvision vs prediction
1.58°
Zoom steps
42

Aircraft & route

Flight
APZ111
Registration
—
Type
—
Airline
Air Premiea
From
ICN · Seoul
To
SFO · San Francisco
Ground speed
256 kt
Altitude at closest
11,500 ft
Vertical rate
-64 ft/min
Category
A5
ICAO hex
71c701

Pass geometry

Max elevation
60.4°
Elevation at start → end
60.4° → 36.7°
Azimuth at start → end
101° E → 124° SE
Closest-approach azimuth
101° E
Minimum slant range
4.0 km
Heading at closest
140° SE
Aspect at closest
quartering (39°)
Turn
straight (2°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:23 (22.5 s)
Lock
75%

Build & tuning

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

Build
2026-10-16c — mount prior carried to the next target (silhouette reach reverted)
Commit
8649c7d
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
21.1 MB · 22.0 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
-0.03
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