skylight.

UAL1244 United

Boeing 737 MAX 9 · N17433 · SFO → ?

· 2:33Quality 91side-onturned left 42°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −65%). 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
87%
First lockfrom target selected
4.3 s
Centring, medianaz / el while locked
0.11° / 0.12°
Centring, 90th pctaz / el while locked
0.43° / 0.76°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
4.9 s
Time to tightestfrom first lock
72.8 s
Time at telefield of view ≤ 5.5°
120.8 s
Jitter at teleaz / el, standard deviation
0.19° / 0.22°
Swing at teleaz / el, peak to peak
1.28° / 2.11°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
3.22°
Largest tilt hopin any 1 s at tele
1.59°
Pose error, mediancommand vs camera
0.52°
Largest correctionvision vs prediction
0.66°
Zoom steps
26

Aircraft & route

Flight
UAL1244
Registration
N17433
Type
Boeing 737 MAX 9
Airline
United
From
SFO
To
—
Ground speed
277 kt
Altitude at closest
6,675 ft
Vertical rate
+2,560 ft/min
Category
A3
ICAO hex
a12ae6

Pass geometry

Max elevation
28.0°
Elevation at start → end
17.3° → 10.3°
Azimuth at start → end
320° NW → 190° S
Closest-approach azimuth
264° W
Minimum slant range
4.3 km
Heading at closest
186° S
Aspect at closest
side-on (77°)
Turn
turned left 42°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
2:33 (152.7 s)
Lock
87%

Build & tuning

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

Build
2026-10-16h — lock-first association on (A/B −40% tele gaps)
Commit
dfc3684
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
75.4 MB · 152.0 s · offset -0.8 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