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THY4MS Turkish Airlines

Airbus A350 941 · TC-LGH · SFO → IST

· 0:55Quality 73nose/tail

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −62%). 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
66%
First lockfrom target selected
18.3 s
Centring, medianaz / el while locked
1.63° / 1.20°
Centring, 90th pctaz / el while locked
10.16° / 5.12°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
—
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
1.2 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
—
Largest tilt hopin any 1 s at tele
—
Pose error, mediancommand vs camera
2.31°
Largest correctionvision vs prediction
4.43°
Zoom steps
67

Aircraft & route

Flight
THY4MS
Registration
TC-LGH
Type
Airbus A350 941 (A359)
Airline
Turkish Airlines
From
SFO · San Francisco
To
IST · Arnavutköy, Istanbul
Ground speed
179 kt
Altitude at closest
1,300 ft
Vertical rate
+1,024 ft/min
Category
A5
ICAO hex
4bb0e8

Pass geometry

Max elevation
80.9°
Elevation at start → end
0.1° → 11.5°
Azimuth at start → end
116° ESE → 300° WNW
Closest-approach azimuth
27° NNE
Minimum slant range
419 m
Heading at closest
298° 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
0:55 (55.1 s)
Lock
66%

Build & tuning

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

Build
2026-10-15q — drive speed latched at the lens position; measured speed bytes only; auto-cal keeps gains
Commit
44f2d6a
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
27.4 MB · 55.0 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
-0.27
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