skylight.

EJA993 NetJets

C68A · N993QS · SFO → ?

· 1:08Quality 83lost locknose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −71%). 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
54%
First lockfrom target selected
22.3 s
Centring, medianaz / el while locked
0.22° / 0.27°
Centring, 90th pctaz / el while locked
1.58° / 1.54°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
14.4 s
Time to tightestfrom first lock
27.9 s
Time at telefield of view ≤ 5.5°
29.5 s
Jitter at teleaz / el, standard deviation
0.34° / 0.26°
Swing at teleaz / el, peak to peak
1.44° / 1.40°
Pan reversalsper 10 s at tele
1.4
Largest pan hopin any 1 s at tele
1.39°
Largest tilt hopin any 1 s at tele
2.13°
Pose error, mediancommand vs camera
1.04°
Largest correctionvision vs prediction
1.25°
Zoom steps
68

Aircraft & route

Flight
EJA993
Registration
N993QS
Type
C68A
Airline
NetJets
From
SFO
To
—
Ground speed
211 kt
Altitude at closest
1,100 ft
Vertical rate
+2,624 ft/min
Category
A2
ICAO hex
addf37

Pass geometry

Max elevation
86.8°
Elevation at start → end
0.1° → 12.0°
Azimuth at start → end
116° ESE → 298° WNW
Closest-approach azimuth
39° NE
Minimum slant range
373 m
Heading at closest
296° WNW
Aspect at closest
nose/tail (2°)
Turn
straight (4°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
1:08 (67.5 s)
Lock
54%

Build & tuning

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

Build
2026-10-15t — vertical rate falls back to geom_rate (server)
Commit
218644c
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
31.0 MB · 64.1 s · offset -1.7 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