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ASA269 Alaska

Boeing 737NG 890/W · N560AS · SFO → ANC

· 0:50Quality 89side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −75%). 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
92%
First lockfrom target selected
4.3 s
Centring, medianaz / el while locked
0.11° / 0.11°
Centring, 90th pctaz / el while locked
0.31° / 0.29°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
2.9 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
42.6 s
Jitter at teleaz / el, standard deviation
0.14° / 0.14°
Swing at teleaz / el, peak to peak
0.84° / 0.73°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.55°
Largest tilt hopin any 1 s at tele
1.27°
Pose error, mediancommand vs camera
0.59°
Largest correctionvision vs prediction
0.33°
Zoom steps
9

Aircraft & route

Flight
ASA269
Registration
N560AS
Type
Boeing 737NG 890/W
Airline
Alaska
From
SFO · San Francisco
To
ANC · Anchorage
Ground speed
287 kt
Altitude at closest
10,675 ft
Vertical rate
+2,496 ft/min
Category
A3
ICAO hex
a726fb

Pass geometry

Max elevation
20.1°
Elevation at start → end
19.2° → 16.9°
Azimuth at start → end
275° W → 233° SW
Closest-approach azimuth
259° W
Minimum slant range
9.3 km
Heading at closest
183° S
Aspect at closest
side-on (77°)
Turn
straight (4°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:50 (49.5 s)
Lock
92%

Build & tuning

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

Build
2026-10-16g — A/B lockFirst (mount prior on)
Commit
9bdc356
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
24.3 MB · 49.0 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
-0.06
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