skylight.

UAL507 United

Boeing 777 224ER · N78013 · SFO → ?

· 0:59Quality 69soft focusnose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −84%). 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
74%
First lockfrom target selected
8.7 s
Centring, medianaz / el while locked
0.48° / 0.47°
Centring, 90th pctaz / el while locked
3.37° / 5.32°
Tightest field of viewhorizontal
6.6°
Time to 8°from first lock
44.6 s
Time to tightestfrom first lock
45.0 s
Time at telefield of view ≤ 5.5°
0.0 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
—
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
0.93°
Largest correctionvision vs prediction
2.97°
Zoom steps
21

Aircraft & route

Flight
UAL507
Registration
N78013
Type
Boeing 777 224ER
Airline
United
From
SFO
To
—
Ground speed
187 kt
Altitude at closest
1,275 ft
Vertical rate
+1,728 ft/min
Category
A5
ICAO hex
aa931d

Pass geometry

Max elevation
82.2°
Elevation at start → end
1.3° → 13.8°
Azimuth at start → end
116° ESE → 298° WNW
Closest-approach azimuth
17° NNE
Minimum slant range
413 m
Heading at closest
296° WNW
Aspect at closest
nose/tail (7°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:59 (59.2 s)
Lock
74%

Build & tuning

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

Build
2026-10-14l — vision lock coasts with the plane; a zoom ends a focus drive
Commit
f5b573a
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
29.6 MB · 59.0 s · offset -1.4 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
-0.22
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