skylight.

FFT2858 Frontier

Airbus A321-271NX · N629FR · SFO → LAX

· 0:47Quality 86nose/tailturned left 22°

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −78%). 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
89%
First lockfrom target selected
5.5 s
Centring, medianaz / el while locked
0.11° / 0.07°
Centring, 90th pctaz / el while locked
0.24° / 0.28°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
2.1 s
Time to tightestfrom first lock
6.4 s
Time at telefield of view ≤ 5.5°
40.6 s
Jitter at teleaz / el, standard deviation
0.13° / 0.14°
Swing at teleaz / el, peak to peak
0.83° / 0.67°
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
1.09°
Largest tilt hopin any 1 s at tele
0.61°
Pose error, mediancommand vs camera
0.34°
Largest correctionvision vs prediction
1.46°
Zoom steps
17

Aircraft & route

Flight
FFT2858
Registration
N629FR
Type
Airbus A321-271NX
Airline
Frontier
From
SFO · San Francisco
To
LAX · Los Angeles
Ground speed
320 kt
Altitude at closest
11,175 ft
Vertical rate
+960 ft/min
Category
A3
ICAO hex
a83839

Pass geometry

Max elevation
20.0°
Elevation at start → end
20.0° → 13.1°
Azimuth at start → end
213° SSW → 197° SSW
Closest-approach azimuth
213° SSW
Minimum slant range
10.0 km
Heading at closest
182° S
Aspect at closest
nose/tail (31°)
Turn
turned left 22°
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
No
Duration
0:47 (47.1 s)
Lock
89%

Build & tuning

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

Build
2026-10-16i — lock-first on; shadow silhouette sky-masked
Commit
5610684
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
3.6 MB · 47.0 s · offset -1.4 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
-0.19
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