skylight.

JSX653 JSX Air

Embraer ERJ-135 LR · N254JX · OAK → LAS

· 0:29Quality 4no planelost lockwrap pinnedquarteringturned left 27°Dead-zone wrap

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −47%). 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
5%
First lockfrom target selected
7.9 s
Centring, medianaz / el while locked
2.36° / 5.28°
Centring, 90th pctaz / el while locked
2.36° / 5.28°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
—
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
1.1 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
1.93°
Largest correctionvision vs prediction
0.00°
Zoom steps
21

Aircraft & route

Flight
JSX653
Registration
N254JX
Type
Embraer ERJ-135 LR
Airline
JSX Air
From
OAK · Oakland
To
LAS · Las Vegas
Ground speed
312 kt
Altitude at closest
10,950 ft
Vertical rate
+2,176 ft/min
Category
A2
ICAO hex
a26738

Pass geometry

Max elevation
46.1°
Elevation at start → end
46.1° → 27.9°
Azimuth at start → end
237° WSW → 204° SSW
Closest-approach azimuth
237° WSW
Minimum slant range
4.7 km
Heading at closest
195° SSW
Aspect at closest
quartering (42°)
Turn
turned left 27°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
0:29 (29.1 s)
Lock
5%

Build & tuning

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

Build
2026-10-14k — loop integrates real tick time; aim lead −0.2 s
Commit
33c2b35-k
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
14.5 MB · 29.0 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
-0.28
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