skylight.

UAL2649 United

Airbus A319 132 · N895UA · SFO → ?

· 1:57Quality 93side-onturned left 20°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −77%). 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
12.2 s
Centring, medianaz / el while locked
0.14° / 0.12°
Centring, 90th pctaz / el while locked
0.45° / 0.33°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
6.1 s
Time to tightestfrom first lock
62.7 s
Time at telefield of view ≤ 5.5°
93.1 s
Jitter at teleaz / el, standard deviation
0.26° / 0.22°
Swing at teleaz / el, peak to peak
1.87° / 1.59°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
4.20°
Largest tilt hopin any 1 s at tele
3.36°
Pose error, mediancommand vs camera
0.57°
Largest correctionvision vs prediction
1.86°
Zoom steps
37

Aircraft & route

Flight
UAL2649
Registration
N895UA
Type
Airbus A319 132
Airline
United
From
SFO
To
—
Ground speed
291 kt
Altitude at closest
6,950 ft
Vertical rate
+3,968 ft/min
Category
A3
ICAO hex
ac59aa

Pass geometry

Max elevation
38.3°
Elevation at start → end
18.9° → 13.7°
Azimuth at start → end
339° NNW → 199° SSW
Closest-approach azimuth
269° W
Minimum slant range
3.4 km
Heading at closest
190° S
Aspect at closest
side-on (79°)
Turn
turned left 20°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:57 (116.6 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
2026-10-15o — sun keep-out by the frame; no video, no pass
Commit
cb31ea0
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
56.6 MB · 113.8 s · offset -1.0 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
-0.16
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