skylight.

QXE2455 Horizon Air

Embraer EMB-175 LR · N636QX · SEA → OAK

· 0:18Quality 4no planelost locknose/tail

3D replay

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
0%
First lockfrom target selected
—
Centring, medianaz / el while locked
—
Centring, 90th pctaz / el while locked
—
Tightest field of viewhorizontal
7.3°
Time to 8°from first lock
—
Time to tightestfrom first lock
—
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
0.43°
Largest correctionvision vs prediction
0.35°
Zoom steps
32

Aircraft & route

Flight
QXE2455
Registration
N636QX
Type
Embraer EMB-175 LR
Airline
Horizon Air
From
SEA · Seattle
To
OAK · Oakland
Ground speed
284 kt
Altitude at closest
10,625 ft
Vertical rate
-1,472 ft/min
Category
A3
ICAO hex
a8557a

Pass geometry

Max elevation
13.0°
Elevation at start → end
13.0° → 10.6°
Azimuth at start → end
148° SSE → 149° SSE
Closest-approach azimuth
148° SSE
Minimum slant range
14.4 km
Heading at closest
157° SSE
Aspect at closest
nose/tail (10°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:18 (17.5 s)
Lock
0%

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
9.0 MB · 18.0 s · offset -1.6 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
-0.15
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