skylight.

UAL1754 United

Boeing 737 MAX 9 · N17593 · SFO → ?

· 1:25Quality 95side-onturned left 20°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −76%). 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
93%
First lockfrom target selected
4.3 s
Centring, medianaz / el while locked
0.09° / 0.11°
Centring, 90th pctaz / el while locked
0.30° / 0.29°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
6.2 s
Time to tightestfrom first lock
75.8 s
Time at telefield of view ≤ 5.5°
65.2 s
Jitter at teleaz / el, standard deviation
0.15° / 0.15°
Swing at teleaz / el, peak to peak
1.04° / 1.06°
Pan reversalsper 10 s at tele
0.1
Largest pan hopin any 1 s at tele
4.36°
Largest tilt hopin any 1 s at tele
2.70°
Pose error, mediancommand vs camera
1.12°
Largest correctionvision vs prediction
0.30°
Zoom steps
21

Aircraft & route

Flight
UAL1754
Registration
N17593
Type
Boeing 737 MAX 9
Airline
United
From
SFO
To
—
Ground speed
289 kt
Altitude at closest
7,225 ft
Vertical rate
+2,752 ft/min
Category
A3
ICAO hex
a12f6f

Pass geometry

Max elevation
37.2°
Elevation at start → end
18.5° → 18.8°
Azimuth at start → end
326° NW → 196° SSW
Closest-approach azimuth
259° W
Minimum slant range
3.7 km
Heading at closest
176° S
Aspect at closest
side-on (83°)
Turn
turned left 20°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:25 (85.1 s)
Lock
93%

Build & tuning

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

Build
2026-10-15t — vertical rate falls back to geom_rate (server)
Commit
218644c
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
42.5 MB · 88.1 s · offset -4.7 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
-0.09
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