skylight.

ACA757 Air Canada

BOS → YUL

· 1:15Quality 71low zoomside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −76%). 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
91%
First lockfrom target selected
4.9 s
Centring, medianaz / el while locked
0.31° / 0.15°
Centring, 90th pctaz / el while locked
0.89° / 0.38°
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
0.78°
Largest correctionvision vs prediction
0.58°
Zoom steps
0

Aircraft & route

Flight
ACA757
Registration
—
Type
—
Airline
Air Canada
From
BOS · Boston
To
YUL · Montréal
Ground speed
304 kt
Altitude at closest
11,150 ft
Vertical rate
—
Category
A3
ICAO hex
c01505

Pass geometry

Max elevation
25.6°
Elevation at start → end
21.0° → 20.0°
Azimuth at start → end
343° NNW → 59° ENE
Closest-approach azimuth
20° NNE
Minimum slant range
7.9 km
Heading at closest
110° ESE
Aspect at closest
side-on (90°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:15 (74.6 s)
Lock
91%

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
37.4 MB · 75.0 s · offset -1.2 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