N989JC
Gulfstream G550 · N989JC
· 1:25Quality 92nose/tail
Software-steadied: the hops of the camera motor are smoothed out (plane wobble −69%). Download
Trace
Where the aircraft sat in the frame, second by second. Click the chart to jump the video there.
—FOV —az —el —pose —
Loading telemetry…
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
- 68%
- First lockfrom target selected
- 7.5 s
- Centring, medianaz / el while locked
- 0.41° / 0.42°
- Centring, 90th pctaz / el while locked
- 9.11° / 7.19°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 48.2 s
- Time to tightestfrom first lock
- 65.6 s
- Time at telefield of view ≤ 5.5°
- 24.7 s
- Jitter at teleaz / el, standard deviation
- 0.19° / 0.24°
- Swing at teleaz / el, peak to peak
- 1.20° / 1.32°
- Pan reversalsper 10 s at tele
- 1.6
- Largest pan hopin any 1 s at tele
- 0.84°
- Largest tilt hopin any 1 s at tele
- 1.13°
- Pose error, mediancommand vs camera
- 0.87°
- Largest correctionvision vs prediction
- 4.26°
- Zoom steps
- 63
Aircraft & route
- Flight
- N989JC
- Registration
- N989JC
- Type
- Gulfstream G550 (GLF5)
- Airline
- —
- From
- —
- To
- —
- Ground speed
- 197 kt
- Altitude at closest
- 1,650 ft
- Vertical rate
- +1,920 ft/min
- Category
- A3
- ICAO hex
- adcd5e
Pass geometry
- Max elevation
- 81.1°
- Elevation at start → end
- 0.2° → 11.5°
- Azimuth at start → end
- 117° ESE → 299° WNW
- Closest-approach azimuth
- 21° NNE
- Minimum slant range
- 540 m
- Heading at closest
- 297° WNW
- Aspect at closest
- nose/tail (10°)
- Turn
- straight (0°)
- Departure
- Yes — climbing out after take-off
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:25 (84.6 s)
- Lock
- 68%
Build & tuning
The tracker build that flew this pass and the live settings that mattered, so passes can be compared across changes.
- Build
- 2026-10-16b — silhouette fallback reach 0.8° + multipart uploads
- Commit
- 2ed816b
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 42.5 MB · 85.0 s · offset -1.5 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
- -0.03
- 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