skylight.

SKW249R SkyWest

Embraer EMB-175 LL · N505SY · SFO → ?

· 0:20Quality 54lost lockwrap pinnedquarteringDead-zone wrap

3D replay

Software-steadied: the hops of the camera motor are smoothed out (plane wobble −47%). 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
33%
First lockfrom target selected
6.8 s
Centring, medianaz / el while locked
2.60° / 0.99°
Centring, 90th pctaz / el while locked
2.76° / 1.01°
Tightest field of viewhorizontal
3.4°
Time to 8°from first lock
5.8 s
Time to tightestfrom first lock
—
Time at telefield of view ≤ 5.5°
3.2 s
Jitter at teleaz / el, standard deviation
—
Swing at teleaz / el, peak to peak
—
Pan reversalsper 10 s at tele
0.0
Largest pan hopin any 1 s at tele
0.00°
Largest tilt hopin any 1 s at tele
0.82°
Pose error, mediancommand vs camera
0.86°
Largest correctionvision vs prediction
1.59°
Zoom steps
17

Aircraft & route

Flight
SKW249R
Registration
N505SY
Type
Embraer EMB-175 LL
Airline
SkyWest
From
SFO
To
—
Ground speed
324 kt
Altitude at closest
11,025 ft
Vertical rate
+1,088 ft/min
Category
A3
ICAO hex
a64e2a

Pass geometry

Max elevation
28.1°
Elevation at start → end
28.1° → 21.1°
Azimuth at start → end
212° SSW → 199° SSW
Closest-approach azimuth
212° SSW
Minimum slant range
7.2 km
Heading at closest
175° S
Aspect at closest
quartering (37°)
Turn
straight (0°)
Departure
Yes — climbing out after take-off
Zenith pass
No
Dead-zone wrap
Yes — pan pre-positioned across the stop
Duration
0:20 (19.6 s)
Lock
33%

Build & tuning

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

Build
2026-10-14e — feedforward in head axes
Commit
181d1fa+wip
Node
v22.22.2
Camera
TONGVEO 20x PTZ · 1920×1080 @ 30 fps
Clip
10.0 MB · 20.0 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