skylight.

SKW5417 SkyWest

Embraer EMB-175 LL · N621UX

· 0:14Quality 40shortnose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −71%). 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
71%
First lockfrom target selected
4.3 s
Centring, medianaz / el while locked
0.16° / 0.26°
Centring, 90th pctaz / el while locked
0.56° / 0.64°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
2.4 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
9.2 s
Jitter at teleaz / el, standard deviation
0.17° / 0.23°
Swing at teleaz / el, peak to peak
0.71° / 0.90°
Pan reversalsper 10 s at tele
1.1
Largest pan hopin any 1 s at tele
0.92°
Largest tilt hopin any 1 s at tele
1.37°
Pose error, mediancommand vs camera
0.56°
Largest correctionvision vs prediction
1.09°
Zoom steps
15

Aircraft & route

Flight
SKW5417
Registration
N621UX
Type
Embraer EMB-175 LL
Airline
SkyWest
From
—
To
—
Ground speed
249 kt
Altitude at closest
11,525 ft
Vertical rate
0 ft/min
Category
A3
ICAO hex
a81bcc

Pass geometry

Max elevation
35.9°
Elevation at start → end
27.9° → 35.9°
Azimuth at start → end
331° NNW → 335° NNW
Closest-approach azimuth
335° NNW
Minimum slant range
6.0 km
Heading at closest
140° SE
Aspect at closest
nose/tail (15°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:14 (14.4 s)
Lock
71%

Build & tuning

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

Build
2026-10-16g — A/B lockFirst (mount prior on)
Commit
9bdc356
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
7.0 MB · 14.0 s · offset -1.3 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
-0.11
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