skylight.

QXE2455 Horizon Air

Embraer ERJ 170-200 LR · N658QX · SEA → OAK

· 0:51Quality 92side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −70%). 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
87%
First lockfrom target selected
6.4 s
Centring, medianaz / el while locked
0.37° / 0.41°
Centring, 90th pctaz / el while locked
2.99° / 1.00°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
2.7 s
Time to tightestfrom first lock
4.8 s
Time at telefield of view ≤ 5.5°
14.9 s
Jitter at teleaz / el, standard deviation
0.16° / 0.32°
Swing at teleaz / el, peak to peak
0.79° / 1.45°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
3.40°
Largest tilt hopin any 1 s at tele
2.06°
Pose error, mediancommand vs camera
0.95°
Largest correctionvision vs prediction
1.33°
Zoom steps
25

Aircraft & route

Flight
QXE2455
Registration
N658QX
Type
Embraer ERJ 170-200 LR
Airline
Horizon Air
From
SEA · Seattle
To
OAK · Oakland
Ground speed
362 kt
Altitude at closest
12,800 ft
Vertical rate
-1,664 ft/min
Category
A3
ICAO hex
a8abe6

Pass geometry

Max elevation
72.3°
Elevation at start → end
27.5° → 63.7°
Azimuth at start → end
328° NNW → 100° E
Closest-approach azimuth
49° NE
Minimum slant range
4.1 km
Heading at closest
140° SE
Aspect at closest
side-on (89°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:51 (50.5 s)
Lock
87%

Build & tuning

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

Build
2026-10-12i — focus jumps only to trusted tele points; rate-steered setpoint; bias learned only when still
Commit
68739f5+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
25.0 MB · 50.0 s · offset -1.1 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