UAL984 United
Boeing 777 222ER · N797UA · CDG → SFO
· 1:11Quality 94side-on
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
- 89%
- First lockfrom target selected
- 7.4 s
- Centring, medianaz / el while locked
- 0.10° / 0.11°
- Centring, 90th pctaz / el while locked
- 0.27° / 0.28°
- Tightest field of viewhorizontal
- 3.4°
- Time to 8°from first lock
- 4.2 s
- Time to tightestfrom first lock
- —
- Time at telefield of view ≤ 5.5°
- 53.0 s
- Jitter at teleaz / el, standard deviation
- 0.13° / 0.15°
- Swing at teleaz / el, peak to peak
- 0.70° / 0.78°
- Pan reversalsper 10 s at tele
- 0.0
- Largest pan hopin any 1 s at tele
- 2.01°
- Largest tilt hopin any 1 s at tele
- 1.04°
- Pose error, mediancommand vs camera
- 0.61°
- Largest correctionvision vs prediction
- 0.88°
- Zoom steps
- 38
Aircraft & route
- Flight
- UAL984
- Registration
- N797UA
- Type
- Boeing 777 222ER
- Airline
- United
- From
- CDG · Paris
- To
- SFO · San Francisco
- Ground speed
- 245 kt
- Altitude at closest
- 11,425 ft
- Vertical rate
- +64 ft/min
- Category
- A5
- ICAO hex
- aad3c9
Pass geometry
- Max elevation
- 29.7°
- Elevation at start → end
- 28.6° → 20.5°
- Azimuth at start → end
- 4° N → 70° ENE
- Closest-approach azimuth
- 21° NNE
- Minimum slant range
- 7.1 km
- Heading at closest
- 111° ESE
- Aspect at closest
- side-on (90°)
- Turn
- straight (0°)
- Departure
- No
- Zenith pass
- No
- Dead-zone wrap
- No
- Duration
- 1:11 (70.7 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
- 2026-10-15o — sun keep-out by the frame; no video, no pass
- Commit
- cb31ea0
- Node
- v22.22.2
- Camera
- TONGVEO 20x PTZ · 1920×1080 @ 30 fps
- Clip
- 34.1 MB · 67.8 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
- -0.16
- 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