skylight.

ASA1457 Alaska

Boeing 737-8 · N804AK · SFO → ?

· 1:21Quality 89lost lockside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
91%
First lockfrom target selected
7.1 s
Centring, medianaz / el while locked
0.12° / 0.08°
Centring, 90th pctaz / el while locked
0.34° / 0.24°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.7 s
Time to tightestfrom first lock
70.1 s
Time at telefield of view ≤ 5.5°
65.6 s
Jitter at teleaz / el, standard deviation
0.17° / 0.12°
Swing at teleaz / el, peak to peak
0.99° / 0.73°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
13.67°
Largest tilt hopin any 1 s at tele
4.92°
Pose error, mediancommand vs camera
1.01°
Largest correctionvision vs prediction
0.59°
Zoom steps
14

Aircraft & route

Flight
ASA1457
Registration
N804AK
Type
Boeing 737-8
Airline
Alaska
From
SFO
To
—
Ground speed
279 kt
Altitude at closest
7,275 ft
Vertical rate
+2,688 ft/min
Category
A3
ICAO hex
aaf0c3

Pass geometry

Max elevation
32.2°
Elevation at start → end
18.5° → 19.2°
Azimuth at start → end
322° NW → 211° SSW
Closest-approach azimuth
264° W
Minimum slant range
4.1 km
Heading at closest
183° S
Aspect at closest
side-on (81°)
Turn
straight (8°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:21 (80.6 s)
Lock
91%

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
40.5 MB · 81.0 s · offset -1.5 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
-0.11
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