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ASA1303 Alaska

Boeing 737NG 890/W · N596AS

· 2:19Quality 88side-onturned 42°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −78%). 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
96%
First lockfrom target selected
5.5 s
Centring, medianaz / el while locked
0.14° / 0.12°
Centring, 90th pctaz / el while locked
0.46° / 0.33°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.7 s
Time to tightestfrom first lock
9.1 s
Time at telefield of view ≤ 5.5°
106.1 s
Jitter at teleaz / el, standard deviation
0.19° / 0.17°
Swing at teleaz / el, peak to peak
1.33° / 1.44°
Pan reversalsper 10 s at tele
0.8
Largest pan hopin any 1 s at tele
3.65°
Largest tilt hopin any 1 s at tele
2.84°
Pose error, mediancommand vs camera
0.68°
Largest correctionvision vs prediction
2.42°
Zoom steps
33

Aircraft & route

Flight
ASA1303
Registration
N596AS
Type
Boeing 737NG 890/W
Airline
Alaska
From
—
To
—
Ground speed
316 kt
Altitude at closest
12,775 ft
Vertical rate
-640 ft/min
Category
A3
ICAO hex
a7b3c2

Pass geometry

Max elevation
72.1°
Elevation at start → end
18.0° → 23.8°
Azimuth at start → end
328° NNW → 142° SE
Closest-approach azimuth
49° NE
Minimum slant range
4.1 km
Heading at closest
140° SE
Aspect at closest
side-on (89°)
Turn
turned 42°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
2:19 (139.1 s)
Lock
96%

Build & tuning

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

Build
2026-10-16i — lock-first on; shadow silhouette sky-masked
Commit
5610684
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
15.3 MB · 139.0 s · offset -1.1 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
-0.19
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