skylight.

ACA568 Air Canada

YVR → SFO

· 2:44Quality 94side-onturned right 16°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −75%). 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
88%
First lockfrom target selected
10.3 s
Centring, medianaz / el while locked
0.11° / 0.13°
Centring, 90th pctaz / el while locked
0.43° / 0.30°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.3 s
Time to tightestfrom first lock
102.3 s
Time at telefield of view ≤ 5.5°
131.2 s
Jitter at teleaz / el, standard deviation
0.18° / 0.17°
Swing at teleaz / el, peak to peak
1.67° / 1.02°
Pan reversalsper 10 s at tele
0.4
Largest pan hopin any 1 s at tele
5.45°
Largest tilt hopin any 1 s at tele
2.12°
Pose error, mediancommand vs camera
0.54°
Largest correctionvision vs prediction
1.77°
Zoom steps
44

Aircraft & route

Flight
ACA568
Registration
—
Type
—
Airline
Air Canada
From
YVR · Vancouver
To
SFO · San Francisco
Ground speed
284 kt
Altitude at closest
11,450 ft
Vertical rate
-64 ft/min
Category
A3
ICAO hex
c012aa

Pass geometry

Max elevation
70.4°
Elevation at start → end
22.2° → 13.5°
Azimuth at start → end
328° NNW → 145° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.7 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
turned right 16°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
2:44 (163.7 s)
Lock
88%

Build & tuning

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

Build
2026-10-15t — vertical rate falls back to geom_rate (server)
Commit
218644c
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
81.6 MB · 163.0 s · offset -1.0 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