{
  "target_markers_xyz": [
    [
      3.8161818546850133,
      1.7908451370913225,
      -0.14276251343501434
    ],
    [
      3.8024997096296125,
      1.8050785629564776,
      0.06566707484948808
    ],
    [
      3.6713473847868006,
      2.04941852457094,
      -0.1724258628658044
    ],
    [
      3.6547948095860474,
      2.062611396716776,
      0.037702029901830025
    ]
  ],
  "target_center_xyz": [
    3.7361472433747913,
    1.927179491986989,
    -0.05300525430533298
  ],
  "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."
}