skylight.

UAL1754 United

Boeing 737NG 824/W · N77536 · SFO → ?

· 1:04Quality 93side-onturned 30°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −70%). 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
3.9 s
Centring, medianaz / el while locked
0.74° / 0.43°
Centring, 90th pctaz / el while locked
2.65° / 1.34°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
5.1 s
Time to tightestfrom first lock
9.9 s
Time at telefield of view ≤ 5.5°
15.0 s
Jitter at teleaz / el, standard deviation
0.42° / 0.26°
Swing at teleaz / el, peak to peak
1.78° / 0.90°
Pan reversalsper 10 s at tele
0.7
Largest pan hopin any 1 s at tele
3.26°
Largest tilt hopin any 1 s at tele
6.63°
Pose error, mediancommand vs camera
1.27°
Largest correctionvision vs prediction
0.54°
Zoom steps
41

Aircraft & route

Flight
UAL1754
Registration
N77536
Type
Boeing 737NG 824/W
Airline
United
From
SFO
To
—
Ground speed
288 kt
Altitude at closest
8,000 ft
Vertical rate
+2,304 ft/min
Category
A3
ICAO hex
aa7e7a

Pass geometry

Max elevation
47.1°
Elevation at start → end
19.3° → 28.0°
Azimuth at start → end
338° NNW → 214° SSW
Closest-approach azimuth
271° W
Minimum slant range
3.4 km
Heading at closest
184° S
Aspect at closest
side-on (87°)
Turn
turned 30°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:04 (64.4 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
2026-10-12i — focus jumps only to trusted tele points; rate-steered setpoint; bias learned only when still
Commit
68739f5+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
32.5 MB · 65.0 s · offset -1.8 s
pursuit
velocity
maxLeadSec
3
panLatencySec
0.6
tiltLatencySec
0.4
rippleDeg
0.5
rippleTeleDeg
0.25
rateFloorDegPerDps
2.5
rateFloorMaxDeg
12
lockedSigmaDeg
0.35
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