skylight.

UAL1164 United

Boeing 737 MAX 9 · N17433 · SFO → ?

· 2:07Quality 87lost lockside-onturned 23°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −69%). 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
90%
First lockfrom target selected
5.3 s
Centring, medianaz / el while locked
0.11° / 0.12°
Centring, 90th pctaz / el while locked
0.49° / 0.34°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
3.9 s
Time to tightestfrom first lock
67.2 s
Time at telefield of view ≤ 5.5°
94.9 s
Jitter at teleaz / el, standard deviation
0.19° / 0.21°
Swing at teleaz / el, peak to peak
1.22° / 1.46°
Pan reversalsper 10 s at tele
0.2
Largest pan hopin any 1 s at tele
6.01°
Largest tilt hopin any 1 s at tele
5.02°
Pose error, mediancommand vs camera
0.44°
Largest correctionvision vs prediction
1.82°
Zoom steps
33

Aircraft & route

Flight
UAL1164
Registration
N17433
Type
Boeing 737 MAX 9
Airline
United
From
SFO
To
—
Ground speed
261 kt
Altitude at closest
6,400 ft
Vertical rate
+1,600 ft/min
Category
A3
ICAO hex
a12ae6

Pass geometry

Max elevation
49.5°
Elevation at start → end
19.5° → 13.0°
Azimuth at start → end
346° NNW → 199° SSW
Closest-approach azimuth
276° W
Minimum slant range
2.6 km
Heading at closest
191° S
Aspect at closest
side-on (85°)
Turn
turned 23°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
2:07 (127.0 s)
Lock
90%

Build & tuning

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

Build
2026-10-16b — silhouette fallback reach 0.8° + multipart uploads
Commit
2ed816b
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
63.5 MB · 127.0 s · offset -0.9 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
-0.03
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