skylight.

EJM109

Bombardier Challenger 300 · N752M

· 0:42Quality 88nose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
73%
First lockfrom target selected
2.6 s
Centring, medianaz / el while locked
0.32° / 0.38°
Centring, 90th pctaz / el while locked
5.79° / 3.15°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
20.4 s
Time to tightestfrom first lock
22.2 s
Time at telefield of view ≤ 5.5°
12.1 s
Jitter at teleaz / el, standard deviation
0.18° / 0.26°
Swing at teleaz / el, peak to peak
0.77° / 0.94°
Pan reversalsper 10 s at tele
1.6
Largest pan hopin any 1 s at tele
1.24°
Largest tilt hopin any 1 s at tele
1.08°
Pose error, mediancommand vs camera
0.85°
Largest correctionvision vs prediction
2.33°
Zoom steps
28

Aircraft & route

Flight
EJM109
Registration
N752M
Type
Bombardier Challenger 300
Airline
—
From
—
To
—
Ground speed
179 kt
Altitude at closest
1,100 ft
Vertical rate
—
Category
A2
ICAO hex
aa228a

Pass geometry

Max elevation
83.5°
Elevation at start → end
18.3° → 13.3°
Azimuth at start → end
113° ESE → 297° WNW
Closest-approach azimuth
19° NNE
Minimum slant range
317 m
Heading at closest
296° WNW
Aspect at closest
nose/tail (5°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:42 (42.2 s)
Lock
73%

Build & tuning

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

Build
2026-10-14i — zoom sigma grows after lock loss (0.1°/s)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
21.0 MB · 42.0 s · offset -1.2 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
0.59
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