skylight.

ASA1369 Alaska

Boeing 737NG 890/W · N568AS · SFO → ?

· 1:23Quality 74side-onturned left 23°Dead-zone wrap

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −49%). 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
73%
First lockfrom target selected
5.1 s
Centring, medianaz / el while locked
0.90° / 0.28°
Centring, 90th pctaz / el while locked
3.24° / 0.68°
Tightest field of viewhorizontal
10.8°
Time to 8°from first lock
—
Time to tightestfrom first lock
0.0 s
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
1.00°
Largest correctionvision vs prediction
0.58°
Zoom steps
0

Aircraft & route

Flight
ASA1369
Registration
N568AS
Type
Boeing 737NG 890/W
Airline
Alaska
From
SFO
To
—
Ground speed
316 kt
Altitude at closest
9,450 ft
Vertical rate
+2,240 ft/min
Category
A3
ICAO hex
a744b3

Pass geometry

Max elevation
34.6°
Elevation at start → end
18.3° → 18.1°
Azimuth at start → end
325° NW → 210° SSW
Closest-approach azimuth
263° W
Minimum slant range
5.1 km
Heading at closest
179° S
Aspect at closest
side-on (84°)
Turn
turned left 23°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
1:23 (82.9 s)
Lock
73%

Build & tuning

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

Build
2026-10-13f — log which rule set the zoom (zw)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
41.0 MB · 82.0 s · offset -0.7 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