skylight.

BAW28K British Airways

Boeing 777 336ER · G-STBG · LHR → SFO

· 0:25Quality 84nose/tailturned right 18°

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
86%
First lockfrom target selected
2.7 s
Centring, medianaz / el while locked
0.24° / 0.30°
Centring, 90th pctaz / el while locked
0.54° / 1.45°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
7.8 s
Time to tightestfrom first lock
9.9 s
Time at telefield of view ≤ 5.5°
8.2 s
Jitter at teleaz / el, standard deviation
0.19° / 0.27°
Swing at teleaz / el, peak to peak
0.81° / 0.90°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.94°
Largest tilt hopin any 1 s at tele
1.56°
Pose error, mediancommand vs camera
0.70°
Largest correctionvision vs prediction
0.69°
Zoom steps
13

Aircraft & route

Flight
BAW28K
Registration
G-STBG
Type
Boeing 777 336ER
Airline
British Airways
From
LHR · London
To
SFO · San Francisco
Ground speed
266 kt
Altitude at closest
11,250 ft
Vertical rate
0 ft/min
Category
A5
ICAO hex
406947

Pass geometry

Max elevation
41.1°
Elevation at start → end
41.1° → 25.2°
Azimuth at start → end
121° ESE → 134° SE
Closest-approach azimuth
121° ESE
Minimum slant range
5.2 km
Heading at closest
140° SE
Aspect at closest
nose/tail (19°)
Turn
turned right 18°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
0:25 (24.5 s)
Lock
86%

Build & tuning

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

Build
2026-10-13j — full 3.4 deg tele for slow planes (limit only above 0.5 deg/s)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
11.3 MB · 23.4 s · offset -1.6 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