skylight.

ANA108 All Nippon Airways

Boeing 777 381ER · JA791A · HND → SFO

· 1:30Quality 89side-onturned right 20°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −73%). 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
70%
First lockfrom target selected
7.3 s
Centring, medianaz / el while locked
0.40° / 0.39°
Centring, 90th pctaz / el while locked
1.79° / 1.18°
Tightest field of viewhorizontal
4.1°
Time to 8°from first lock
28.8 s
Time to tightestfrom first lock
57.3 s
Time at telefield of view ≤ 5.5°
19.1 s
Jitter at teleaz / el, standard deviation
0.24° / 0.18°
Swing at teleaz / el, peak to peak
1.00° / 0.83°
Pan reversalsper 10 s at tele
1.1
Largest pan hopin any 1 s at tele
15.70°
Largest tilt hopin any 1 s at tele
4.82°
Pose error, mediancommand vs camera
0.87°
Largest correctionvision vs prediction
3.44°
Zoom steps
49

Aircraft & route

Flight
ANA108
Registration
JA791A
Type
Boeing 777 381ER
Airline
All Nippon Airways
From
HND · Tokyo
To
SFO · San Francisco
Ground speed
268 kt
Altitude at closest
11,250 ft
Vertical rate
0 ft/min
Category
A5
ICAO hex
8694d8

Pass geometry

Max elevation
69.8°
Elevation at start → end
50.4° → 18.5°
Azimuth at start → end
346° NNW → 141° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.7 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
turned right 20°
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
1:30 (89.8 s)
Lock
70%

Build & tuning

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

Build
2026-10-13i — slower zoom ladder (one rung, 1.5 s)
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
45.0 MB · 90.0 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