{
  "target_markers_xyz": [
    [
      NaN,
      NaN,
      NaN
    ],
    [
      1.5432033290744904,
      -2.2244713197396613,
      0.0704124136619999
    ],
    [
      1.766862567973865,
      -2.0517891884566515,
      -0.16317895830397267
    ],
    [
      1.779881265041547,
      -2.041438253469307,
      0.04768254018187301
    ]
  ],
  "target_center_xyz": [
    1.6547699349157663,
    -2.137331344523049,
    -0.04579079272444009
  ],
  "description": "4 individual corner-reflector target markers ('CalibrationTarget-Marker 1..4'), mean over ~630 raw OptiTrack frames for this position, transform-corrected into the published radar-centered frame (see calibration/axis_convention.json). target_center_xyz is the corresponding transformed rigid-body centroid."
}