skylight.

PXT680

Cessna Citation Sovereign · N680PC · SFO → LVK

· 1:17Quality 70lost locknose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −67%). 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
22.2 s
Centring, medianaz / el while locked
0.45° / 0.49°
Centring, 90th pctaz / el while locked
1.82° / 1.99°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
12.6 s
Time to tightestfrom first lock
54.9 s
Time at telefield of view ≤ 5.5°
24.3 s
Jitter at teleaz / el, standard deviation
0.60° / 0.40°
Swing at teleaz / el, peak to peak
2.65° / 1.92°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
11.56°
Largest tilt hopin any 1 s at tele
10.59°
Pose error, mediancommand vs camera
1.10°
Largest correctionvision vs prediction
3.10°
Zoom steps
94

Aircraft & route

Flight
PXT680
Registration
N680PC
Type
Cessna Citation Sovereign (C680)
Airline
—
From
SFO · San Francisco
To
LVK · Livermore
Ground speed
233 kt
Altitude at closest
2,475 ft
Vertical rate
+2,752 ft/min
Category
A2
ICAO hex
a9047f

Pass geometry

Max elevation
88.2°
Elevation at start → end
0.0° → 13.6°
Azimuth at start → end
117° ESE → 298° WNW
Closest-approach azimuth
214° SW
Minimum slant range
783 m
Heading at closest
298° WNW
Aspect at closest
nose/tail (2°)
Turn
straight (5°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:17 (77.1 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
2026-10-14n — vision skyline mask 31x cheaper (loop back to ~15 Hz)
Commit
af2a83e
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
38.5 MB · 77.0 s · offset -1.1 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
-0.16
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