skylight.

ASA1413 Alaska

Boeing 737NG 890/W · N585AS

· 1:36Quality 92side-onturned right 17°

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
79%
First lockfrom target selected
8.2 s
Centring, medianaz / el while locked
0.57° / 0.45°
Centring, 90th pctaz / el while locked
3.03° / 1.77°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
2.6 s
Time to tightestfrom first lock
88.1 s
Time at telefield of view ≤ 5.5°
22.3 s
Jitter at teleaz / el, standard deviation
0.46° / 0.42°
Swing at teleaz / el, peak to peak
1.83° / 2.37°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
3.64°
Largest tilt hopin any 1 s at tele
1.95°
Pose error, mediancommand vs camera
0.87°
Largest correctionvision vs prediction
0.64°
Zoom steps
42

Aircraft & route

Flight
ASA1413
Registration
N585AS
Type
Boeing 737NG 890/W (B738)
Airline
Alaska
From
—
To
—
Ground speed
375 kt
Altitude at closest
13,575 ft
Vertical rate
-2,176 ft/min
Category
A3
ICAO hex
a7888c

Pass geometry

Max elevation
73.7°
Elevation at start → end
30.3° → 21.2°
Azimuth at start → end
329° NNW → 144° SE
Closest-approach azimuth
50° NE
Minimum slant range
4.3 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
turned right 17°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:36 (96.4 s)
Lock
79%

Build & tuning

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

Build
2026-10-14e — feedforward in head axes
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
48.0 MB · 96.0 s · offset -0.9 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