skylight.

BAW28K British Airways

Boeing 777 336ER · G-STBG · LHR → SFO

· 1:11Quality 81side-on

3D replay

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
78%
First lockfrom target selected
6.8 s
Centring, medianaz / el while locked
0.50° / 0.62°
Centring, 90th pctaz / el while locked
3.57° / 1.75°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
6.5 s
Time to tightestfrom first lock
8.3 s
Time at telefield of view ≤ 5.5°
11.5 s
Jitter at teleaz / el, standard deviation
0.40° / 0.35°
Swing at teleaz / el, peak to peak
1.51° / 1.00°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
4.35°
Largest tilt hopin any 1 s at tele
1.85°
Pose error, mediancommand vs camera
0.84°
Largest correctionvision vs prediction
1.14°
Zoom steps
38

Aircraft & route

Flight
BAW28K
Registration
G-STBG
Type
Boeing 777 336ER
Airline
British Airways
From
LHR · London
To
SFO · San Francisco
Ground speed
268 kt
Altitude at closest
11,250 ft
Vertical rate
-64 ft/min
Category
A5
ICAO hex
406947

Pass geometry

Max elevation
69.8°
Elevation at start → end
25.4° → 47.1°
Azimuth at start → end
330° NNW → 117° ESE
Closest-approach azimuth
50° NE
Minimum slant range
3.7 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
straight (0°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:11 (71.0 s)
Lock
78%

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
36.0 MB · 72.0 s · offset -1.8 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