skylight.

UAL507 United

Boeing 777 224ER · N78017 · SFO → ?

· 1:09Quality 84side-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −72%). 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
67%
First lockfrom target selected
17.9 s
Centring, medianaz / el while locked
0.87° / 0.65°
Centring, 90th pctaz / el while locked
5.72° / 5.42°
Tightest field of viewhorizontal
5.0°
Time to 8°from first lock
38.2 s
Time to tightestfrom first lock
45.7 s
Time at telefield of view ≤ 5.5°
3.7 s
Jitter at teleaz / el, standard deviation
0.15° / 0.18°
Swing at teleaz / el, peak to peak
0.48° / 0.62°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
0.63°
Largest tilt hopin any 1 s at tele
0.88°
Pose error, mediancommand vs camera
0.89°
Largest correctionvision vs prediction
4.78°
Zoom steps
48

Aircraft & route

Flight
UAL507
Registration
N78017
Type
Boeing 777 224ER
Airline
United
From
SFO
To
—
Ground speed
178 kt
Altitude at closest
1,275 ft
Vertical rate
+2,624 ft/min
Category
A5
ICAO hex
aa9321

Pass geometry

Max elevation
76.6°
Elevation at start → end
2.2° → 13.7°
Azimuth at start → end
116° ESE → 298° WNW
Closest-approach azimuth
26° NNE
Minimum slant range
438 m
Heading at closest
298° WNW
Aspect at closest
side-on (88°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:09 (68.7 s)
Lock
67%

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
33.9 MB · 68.0 s · offset -0.9 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