skylight.

XLJ784

Bombardier Learjet 40 XR · N784CC · SFO → ?

· 1:09Quality 76lens stucknose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −68%). 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
48%
First lockfrom target selected
25.9 s
Centring, medianaz / el while locked
0.28° / 0.44°
Centring, 90th pctaz / el while locked
2.15° / 1.76°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
26.3 s
Time to tightestfrom first lock
38.0 s
Time at telefield of view ≤ 5.5°
10.4 s
Jitter at teleaz / el, standard deviation
0.23° / 0.32°
Swing at teleaz / el, peak to peak
0.80° / 1.15°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.14°
Largest tilt hopin any 1 s at tele
1.82°
Pose error, mediancommand vs camera
0.96°
Largest correctionvision vs prediction
2.02°
Zoom steps
31

Aircraft & route

Flight
XLJ784
Registration
N784CC
Type
Bombardier Learjet 40 XR
Airline
—
From
SFO
To
—
Ground speed
214 kt
Altitude at closest
1,600 ft
Vertical rate
+2,880 ft/min
Category
A2
ICAO hex
aa9f97

Pass geometry

Max elevation
80.9°
Elevation at start → end
0.9° → 13.5°
Azimuth at start → end
117° ESE → 299° WNW
Closest-approach azimuth
28° NNE
Minimum slant range
522 m
Heading at closest
297° WNW
Aspect at closest
nose/tail (8°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:09 (68.6 s)
Lock
48%

Build & tuning

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

Build
2026-10-14e — feedforward in head axes
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
34.5 MB · 69.0 s · offset -1.3 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