skylight.

TZP26 ZIPAIR

Boeing 787-8 · JA850J · NRT → SFO

· 2:03Quality 97clip shortside-on

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −82%). 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
95%
First lockfrom target selected
4.8 s
Centring, medianaz / el while locked
0.10° / 0.13°
Centring, 90th pctaz / el while locked
0.40° / 0.31°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
7.1 s
Time to tightestfrom first lock
72.1 s
Time at telefield of view ≤ 5.5°
90.5 s
Jitter at teleaz / el, standard deviation
0.16° / 0.17°
Swing at teleaz / el, peak to peak
1.43° / 1.10°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
6.60°
Largest tilt hopin any 1 s at tele
3.06°
Pose error, mediancommand vs camera
0.45°
Largest correctionvision vs prediction
1.42°
Zoom steps
47

Aircraft & route

Flight
TZP26
Registration
JA850J
Type
Boeing 787-8
Airline
ZIPAIR
From
NRT · Tokyo
To
SFO · San Francisco
Ground speed
259 kt
Altitude at closest
11,475 ft
Vertical rate
0 ft/min
Category
A5
ICAO hex
86e036

Pass geometry

Max elevation
70.2°
Elevation at start → end
53.7° → 12.1°
Azimuth at start → end
349° N → 144° SE
Closest-approach azimuth
50° NE
Minimum slant range
3.7 km
Heading at closest
140° SE
Aspect at closest
side-on (90°)
Turn
straight (14°)
Departure
No
Zenith pass
No
Dead-zone wrap
No
Duration
2:03 (123.0 s)
Lock
95%

Build & tuning

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

Build
2026-10-16c — mount prior carried to the next target (silhouette reach reverted)
Commit
8649c7d
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
69.0 MB · 79.1 s · offset -0.4 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
-0.1
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