skylight.

EJM450

Gulfstream Aerospace G450 · N450QS

· 0:54Quality 82nose/tailOverhead

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −78%). 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
52%
First lockfrom target selected
12.2 s
Centring, medianaz / el while locked
0.32° / 0.41°
Centring, 90th pctaz / el while locked
2.64° / 3.14°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
23.4 s
Time to tightestfrom first lock
34.3 s
Time at telefield of view ≤ 5.5°
9.8 s
Jitter at teleaz / el, standard deviation
0.23° / 0.18°
Swing at teleaz / el, peak to peak
0.81° / 0.72°
Pan reversalsper 10 s at tele
4.1
Largest pan hopin any 1 s at tele
1.03°
Largest tilt hopin any 1 s at tele
0.84°
Pose error, mediancommand vs camera
1.06°
Largest correctionvision vs prediction
2.23°
Zoom steps
34

Aircraft & route

Flight
EJM450
Registration
N450QS
Type
Gulfstream Aerospace G450 (GLF4)
Airline
—
From
—
To
—
Ground speed
202 kt
Altitude at closest
1,225 ft
Vertical rate
+2,688 ft/min
Category
A2
ICAO hex
a5738b

Pass geometry

Max elevation
83.2°
Elevation at start → end
0.7° → 13.8°
Azimuth at start → end
115° ESE → 297° WNW
Closest-approach azimuth
28° NNE
Minimum slant range
397 m
Heading at closest
295° WNW
Aspect at closest
nose/tail (7°)
Turn
straight (5°)
Departure
Yes — climbing out after take-off
Zenith pass
Yes — camera flipped over the top
Dead-zone wrap
No
Duration
0:54 (53.7 s)
Lock
52%

Build & tuning

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

Build
2026-10-13l — log why the zoom ladder moved
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
27.0 MB · 54.0 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