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      "forearm_r": {
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        "source_alignment_degrees": 4.414965921126308e-06,
        "evaluated_rotation_error_degrees": 1.1066173211767495e-05
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    },
    {
      "pelvis_frame": {
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      "lower_spine": {
        "observation": "two_directions",
        "transfer_mode": "reference_delta",
        "direction_error_degrees": 8.800496018774276e-07,
        "rotation_step_degrees": 1.17900616605496,
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      "upper_spine": {
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        "rotation_step_degrees": 3.0406549540554773,
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      "lower_neck": {
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      "upper_neck": {
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      "hip_l": {
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      "collar_l": {
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      "shoulder_l": {
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      "shin_r": {
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      "foot_r": {
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        "direction_error_degrees": 5.126197727807825e-05,
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        "source_alignment_degrees": 4.061711236857962e-05,
        "evaluated_rotation_error_degrees": 7.257075993138539e-06
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        "rotation_step_degrees": 0.7893144845514448,
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        "evaluated_rotation_error_degrees": 6.1566493183999436e-06
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      "upper_arm_r": {
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        "transfer_mode": "absolute_direction",
        "direction_error_degrees": 3.0040688238532287e-05,
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        "evaluated_direction_error_degrees": 5.863383788846727e-06,
        "source_alignment_degrees": 3.41770836141832e-05,
        "evaluated_rotation_error_degrees": 7.260214188309277e-06
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      "forearm_r": {
        "observation": "direction_only_transport",
        "transfer_mode": "absolute_direction",
        "direction_error_degrees": 6.2979923679366664e-06,
        "rotation_step_degrees": 4.183437392387119,
        "expected_target_direction": [
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        "source_alignment_degrees": 8.105933327403523e-06,
        "evaluated_rotation_error_degrees": 9.809112393710933e-06
      }
    }
  ],
  "quality_warnings": [
    "단일 방향 구간의 축 비틀림은 관측값이 아닌 연속 운반 규약입니다.",
    "미대응 본은 기준 로컬 자세를 유지합니다.",
    "접지·루프 재정합은 적용하지 않습니다."
  ]
}