skylight.

ASA1330 Alaska

Boeing 737MAX 9 · N979AK · SFO → ?

· 0:41Quality 79side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −62%). 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
69%
First lockfrom target selected
4.5 s
Centring, medianaz / el while locked
0.62° / 0.26°
Centring, 90th pctaz / el while locked
2.63° / 1.02°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
2.9 s
Time to tightestfrom first lock
5.4 s
Time at telefield of view ≤ 5.5°
7.1 s
Jitter at teleaz / el, standard deviation
1.09° / 0.39°
Swing at teleaz / el, peak to peak
3.32° / 1.21°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
5.72°
Largest tilt hopin any 1 s at tele
1.99°
Pose error, mediancommand vs camera
1.13°
Largest correctionvision vs prediction
1.00°
Zoom steps
37

Aircraft & route

Flight
ASA1330
Registration
N979AK
Type
Boeing 737MAX 9
Airline
Alaska
From
SFO
To
—
Ground speed
289 kt
Altitude at closest
7,875 ft
Vertical rate
+2,816 ft/min
Category
A3
ICAO hex
ada51e

Pass geometry

Max elevation
31.2°
Elevation at start → end
18.1° → 30.2°
Azimuth at start → end
321° NW → 251° WSW
Closest-approach azimuth
266° W
Minimum slant range
4.6 km
Heading at closest
184° S
Aspect at closest
side-on (82°)
Turn
straight (4°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:41 (40.7 s)
Lock
69%

Build & tuning

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

Build
2026-10-13i — slower zoom ladder (one rung, 1.5 s)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
20.0 MB · 40.0 s · offset -1.0 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