{
  "target_markers_xyz": [
    [
      2.865903154571712,
      2.0713655886182765,
      -0.0789296251107956
    ],
    [
      NaN,
      NaN,
      NaN
    ],
    [
      2.688494359130364,
      2.306376791858904,
      -0.10943828740530681
    ],
    [
      2.6551685193308243,
      2.305474308215115,
      0.10005203594071732
    ]
  ],
  "target_center_xyz": [
    2.774174300394443,
    2.1692225285918956,
    0.029021501630858815
  ],
  "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."
}