skylight.

UAL2610 United

Boeing 737-9 · N77581 · SFO → ?

· 0:36Quality 71lost lockquartering

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −79%). 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
51%
First lockfrom target selected
8.8 s
Centring, medianaz / el while locked
0.14° / 0.10°
Centring, 90th pctaz / el while locked
0.55° / 0.66°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
5.4 s
Time to tightestfrom first lock
15.3 s
Time at telefield of view ≤ 5.5°
20.2 s
Jitter at teleaz / el, standard deviation
0.10° / 0.13°
Swing at teleaz / el, peak to peak
0.44° / 0.62°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.23°
Largest tilt hopin any 1 s at tele
0.66°
Pose error, mediancommand vs camera
0.47°
Largest correctionvision vs prediction
0.61°
Zoom steps
30

Aircraft & route

Flight
UAL2610
Registration
N77581
Type
Boeing 737-9
Airline
United
From
SFO
To
—
Ground speed
296 kt
Altitude at closest
8,800 ft
Vertical rate
+3,200 ft/min
Category
A3
ICAO hex
aa7f24

Pass geometry

Max elevation
30.1°
Elevation at start → end
30.0° → 18.4°
Azimuth at start → end
212° SSW → 193° SSW
Closest-approach azimuth
213° SSW
Minimum slant range
5.4 km
Heading at closest
177° S
Aspect at closest
quartering (35°)
Turn
straight (2°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:36 (36.1 s)
Lock
51%

Build & tuning

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

Build
2026-10-15r — keep the target past the sun; paced speed re-latch
Commit
05024bb
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
17.0 MB · 35.0 s · offset -0.1 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
-0.21
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