{
 "schema_version": 1,
 "session": "EgoMotionActions/20261027/LM21/20261027_035312_session43",
 "session_id": "20261027_035312_session43",
 "primitive": "LM21",
 "batch": "20261027",
 "participant": "wangjingjing",
 "participant_source": "manifest",
 "device_ids": {
  "main": "c9205ac6e17d2d5c",
  "left": "452031d7af00ef6f",
  "right": "60a6f081bbe60b0d"
 },
 "generated_at_utc": "2026-10-28T19:50:38.179285+00:00",
 "generated_by": "scripts/sync_dataset.py",
 "time_base": {
  "definition": "t = 0 at the first solved Body0 frame; seconds; each stream has its own t, nothing resampled",
  "mocap_rate_hz": 120.0,
  "mocap_rate_fix": null,
  "first_solved_frame": 0,
  "duration_s": 131.95833333333334,
  "mocap_time": "frame_index / rate (Nokov Timestamp column is not a clock; kept as source_timestamp_ms)"
 },
 "alignment": {
  "reference_imu": "imu_head_right",
  "model": "offset (median of windows)",
  "mocap_rel_s": "rig_rel + offset_s + rate * rig_rel, rig_rel = device_time - reference_imu_first_sample",
  "offset_s": -0.087932,
  "rate": 0.0,
  "global_lag_s": -0.09,
  "peak_corr": 0.9863,
  "reference_imu_first_sample_s": 12421.361745328,
  "windows": {
   "n_windows": 12,
   "window_corr_median": 0.9869968563948541,
   "drift_ppm": 8.729630427417755,
   "drift_se_ppm": 4.295150193477779,
   "drift_ms_over_take": 1.151874734897773,
   "lag_scatter_ms": 0.46887356783644285,
   "lag_range_ms": 1.7026345197017623
  }
 },
 "units": {
  "mocap": "millimetres, Nokov world, Y-up (unchanged)",
  "y_up_to_z_up": [
   [
    1.0,
    0.0,
    0.0
   ],
   [
    0.0,
    0.0,
    -1.0
   ],
   [
    0.0,
    1.0,
    0.0
   ]
  ],
  "acc": "m/s^2 (8192 LSB/g)",
  "gyro": "rad/s (65.536 LSB/dps)",
  "mag": "raw counts, scale unconfirmed (data suggests 163.84 LSB/uT, see knowledge_base sanity doc)",
  "quaternions": "xyzw, Nokov global"
 },
 "calibration": {
  "device": "c9205ac6e17d2d5c",
  "status": "ok",
  "date": "2026-10-21"
 },
 "streams": {
  "sensors": {
   "imu_head_right": {
    "n_acc": 26844,
    "n_gyro": 26839,
    "t_start": -0.09483723846640567,
    "t_end": 132.13386752853333
   },
   "imu_head_left": {
    "n_acc": 26680,
    "n_gyro": 26674,
    "t_start": 0.008322053534376775,
    "t_end": 132.29849383353397
   },
   "imu_wrist_right": {
    "n_acc": 26590,
    "n_gyro": 26604,
    "t_start": -0.8645553414662376,
    "t_end": 130.5507524605346
   },
   "imu_wrist_left": {
    "n_acc": 26621,
    "n_gyro": 26621,
    "t_start": -0.9353662534667623,
    "t_end": 130.54925877353347
   },
   "mag_head": {
    "n": 13238,
    "t_start": 0.09344613653413182,
    "t_end": 132.46342949153407
   },
   "mag_wrist_right": {
    "n": 13141,
    "t_start": -0.8566267664664141,
    "t_end": 130.54333760253397
   },
   "mag_wrist_left": {
    "n": 13147,
    "t_start": -0.9174050814653841,
    "t_end": 130.54245990653365
   }
  },
  "videos": {
   "left": {
    "fps": 30.0,
    "start_device_s": 12421.486896,
    "frames": 3958,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.0026284356473863946,
    "file": "robocap_segment1_video_left.mp4",
    "t_start": 0.03984744318224477,
    "t_end": 131.93988044318215,
    "clock": "device",
    "calibrated": true
   },
   "right": {
    "fps": 30.0,
    "start_device_s": 12421.486878,
    "frames": 3958,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.0024181146161434135,
    "file": "robocap_segment1_video_right.mp4",
    "t_start": 0.03961912214983533,
    "t_end": 131.93964112214965,
    "clock": "device",
    "calibrated": true
   },
   "left_front": {
    "fps": 30.0,
    "start_device_s": 12421.48689,
    "frames": 3958,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.002458947067077895,
    "file": "robocap_segment1_video_left_front.mp4",
    "t_start": 0.03967195460065488,
    "t_end": 131.93969395460047,
    "clock": "device",
    "calibrated": true
   },
   "right_front": {
    "fps": 30.0,
    "start_device_s": 12421.486902,
    "frames": 3958,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.0021420814739499558,
    "file": "robocap_segment1_video_right_front.mp4",
    "t_start": 0.03936708900802989,
    "t_end": 131.93941108900802,
    "clock": "device",
    "calibrated": true
   },
   "left_eye": {
    "fps": 30.0,
    "start_device_s": 12421.486885,
    "frames": 3917,
    "pts_gaps": 37,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.002801984596191448,
    "gap_test": {
     "pts": {
      "offset_ms": 29.9,
      "corr": 0.658,
      "err_ms": 27.1
     },
     "nominal": {
      "offset_ms": 81.4,
      "corr": 0.659,
      "err_ms": 78.6
     }
    },
    "file": "robocap_segment1_video_left_eye.mp4",
    "t_start": 0.04000999212987301,
    "t_end": 131.9566659921293,
    "clock": "device",
    "calibrated": true
   },
   "right_eye": {
    "fps": 30.0,
    "start_device_s": 12421.486869,
    "frames": 3958,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": 0.002930366888236734,
    "file": "robocap_segment1_video_right_eye.mp4",
    "t_start": 0.0401223744229552,
    "t_end": 131.9401223744226,
    "clock": "device",
    "calibrated": true
   },
   "wrist_left": {
    "fps": 30.0,
    "start_device_s": 12420.51043,
    "frames": 3944,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": null,
    "file": "robowrist_452031d7af00ef6f_left/robowrist_segment1_video_left_down.mp4",
    "t_start": -0.9392469924659766,
    "t_end": 130.49395600753454,
    "clock": "device",
    "calibrated": false
   },
   "wrist_right": {
    "fps": 30.0,
    "start_device_s": 12420.579535,
    "frames": 3942,
    "pts_gaps": 0,
    "timing": "pts",
    "timeshift_cam_imu_s": null,
    "file": "robowrist_60a6f081bbe60b0d_right/robowrist_segment1_video_right_down.mp4",
    "t_start": -0.870141992465486,
    "t_end": 130.49652500753476,
    "clock": "device",
    "calibrated": false
   },
   "third_person": {
    "file": "mocap/mocap-LM21-S05-wangjingjing-01p1-1.mp4",
    "frames": 3959,
    "fps": 30.0,
    "clock": "nokov (frame index)",
    "t_start": 0.0,
    "t_end": 131.93333333333334
   }
  }
 },
 "flags": [],
 "sanity": "no sanity report covers this session (run scripts/sanity_check.py)",
 "rig_tracker": {
  "definition": "c9205ac6e17d2d5c/20261027-morning/labels-230415/session-3c7556827adcfbf6",
  "R_tracker0_imu0": [
   [
    -0.66079658,
    0.37194244,
    -0.65192538
   ],
   [
    0.73057381,
    0.11960487,
    -0.67227716
   ],
   [
    -0.17207496,
    -0.92051806,
    -0.35076589
   ]
  ],
  "p_tracker0_imu0_m": [
   -0.11701839813701737,
   -0.005735486281453288,
   -0.12236719628022108
  ],
  "rig_check": {
   "gyro_samples": 4520,
   "gyro_max_deg": 2.5,
   "status": "ok",
   "dropped_marker": null,
   "gyro_deg": 2.097
  },
  "file": "derived/rig_tracker_provider/rig_tracker.json",
  "compose": "T_world_cam(t) = T_world_tracker0(t) @ T_tracker0_cam"
 },
 "canonical": {
  "generated_at_utc": "2026-10-28T23:23:28.599973+00:00",
  "generated_by": "scripts/canonicalise_dataset.py",
  "frame": "Z-up, metres, levelled per Nokov capture block; z = 0 at the Nokov origin; x/y heading as Nokov (global, not per-take)",
  "R_canon_nokov": [
   [
    0.9999917896,
    0.0040522361,
    1.40821e-05
   ],
   [
    -1.40821e-05,
    0.0069501878,
    -0.9999758471
   ],
   [
    -0.0040522361,
    0.9999676366,
    0.0069501878
   ]
  ],
  "scale_nokov_to_canon": 0.001,
  "T_canon_nokov_mm": [
   [
    0.00099999179,
    4.052236e-06,
    1.4082e-08,
    0.0
   ],
   [
    -1.4082e-08,
    6.950188e-06,
    -0.000999975847,
    0.0
   ],
   [
    -4.052236e-06,
    0.000999967637,
    6.950188e-06,
    0.0
   ],
   [
    0.0,
    0.0,
    0.0,
    1.0
   ]
  ],
  "block": "20261027-morning",
  "block_assignment": "trc",
  "tilt_removed_deg": 0.46096270469771533,
  "plane_status": "ok",
  "floor": {
   "sole_marker_p1_mm": 27.6,
   "headtop_p95_mm": 1517.8
  },
  "gravity_check": {
   "static_samples": 770,
   "g_world_mean_m_s2": [
    -0.062,
    0.0364,
    9.7408
   ],
   "tilt_from_z_deg": 0.423,
   "tilt_from_z_deg_before_levelling": 0.625,
   "magnitude_m_s2": 9.741
  },
  "rig_tracker_definition": "c9205ac6e17d2d5c/20261027-morning/labels-230415/session-3c7556827adcfbf6",
  "rig_check": {
   "status": "ok",
   "dropped_marker": null,
   "gyro_deg": 2.097
  },
  "camera_pose_source": "provider T_tracker0_cam",
  "files": [
   "mocap_zup.npz",
   "tracker0_zup.npz",
   "rig_zup.npz",
   "cameras_zup.npz"
  ]
 },
 "smplx": {
  "generated_at_utc": "2026-10-29T07:01:59.530647+00:00",
  "generated_by": "scripts/fit_smplx_dataset.py",
  "file": "smplx.npz",
  "gender": "female",
  "n_betas": 16,
  "betas_source": "participant median (derived/smplx/participants.json)",
  "frame": "canonical (meta.canonical): Z-up metres; fitted in Nokov frame, global_orient/transl rotated, *_nokov kept",
  "pelvis": "transl + rest_joints(betas)[0] (transl is NOT the pelvis)",
  "hands": {
   "observed": false,
   "hand_pose": "flat (zeros, flat_hand_mean=True)",
   "wrist_anchor": "T_world_wrist (F,2,4,4) canonical; hand-marker offsets in wrist frame below",
   "hand_marker_offsets_m": {
    "left": {
     "LHandIn": [
      0.05152636393904686,
      0.01938820257782936,
      0.02341017872095108
     ],
     "LHandOut": [
      0.045927874743938446,
      0.01693861186504364,
      -0.029833655804395676
     ]
    },
    "right": {
     "RHandIn": [
      -0.027948027476668358,
      0.029177086427807808,
      0.000963456928730011
     ],
     "RHandOut": [
      -0.02096189372241497,
      0.011857070028781891,
      -0.031232981011271477
     ]
    }
   }
  },
  "marker_rmse_mm": {
   "median_frame": 3.39,
   "p95_frame": 6.12
  },
  "worst_markers": [
   "RHeel 9mm",
   "RThigh 9mm",
   "RKnee 8mm",
   "RKneeIn 7mm",
   "LElbowIn 7mm"
  ],
  "valid_fraction": 1.0,
  "qc": {
   "lowest_vertex_mm": {
    "median": 17.5,
    "p5": 9.6
   },
   "frames_checked": 528,
   "stature_mm": 1502.4
  },
  "surface_term": {
   "weight": 1.0,
   "marker_height_mm": 11.0,
   "markers_on_surface": 52,
   "surface_rmse_mm_median": 10.71
  },
  "shape_source": "participant median",
  "wrist_correction": {
   "left": {
    "status": "corrected",
    "Q_deg": 16.4,
    "Q_rotvec": [
     0.07496,
     -0.17226,
     0.21597
    ],
    "in_out_sign": 1,
    "wrist_bend_deg_median": 26.3,
    "opposite_sign_bend_deg": 170.9,
    "in_out_convention": "pinky side = HandOut (default IN_OUT_SIGN, no ACE output)",
    "marker_frame_spread_deg": 1.87,
    "hand_vs_marker_frame_deg": {
     "before": 17.06,
     "after": 1.87
    },
    "markers_on_wrist": [
     "LHandIn",
     "LHandOut"
    ],
    "forearm_twist": {
     "twist_moved_deg": 13.6,
     "wrist_twist_deg_after": {
      "median": 0.0,
      "iqr": [
       -4.7,
       2.7
      ]
     },
     "wrist_total_deg_median_after": 22.1,
     "markers_on_forearm": [
      "LForearm",
      "LWristIn",
      "LWristOut"
     ]
    },
    "frames_used": 1500
   },
   "right": {
    "status": "corrected",
    "Q_deg": 48.22,
    "Q_rotvec": [
     -0.186,
     -0.13807,
     -0.80911
    ],
    "in_out_sign": 1,
    "wrist_bend_deg_median": 72.4,
    "opposite_sign_bend_deg": 121.4,
    "in_out_convention": "pinky side = HandOut (default IN_OUT_SIGN, no ACE output)",
    "marker_frame_spread_deg": 2.14,
    "hand_vs_marker_frame_deg": {
     "before": 48.18,
     "after": 2.14
    },
    "markers_on_wrist": [
     "RHandIn",
     "RHandOut"
    ],
    "forearm_twist": {
     "twist_moved_deg": 49.72,
     "wrist_twist_deg_after": {
      "median": 0.0,
      "iqr": [
       -3.7,
       2.2
      ]
     },
     "wrist_total_deg_median_after": 53.4,
     "markers_on_forearm": [
      "RForearm",
      "RWristIn",
      "RWristOut"
     ]
    },
    "frames_used": 1500
   },
   "generated_at_utc": "2026-10-29T07:02:02.583444+00:00",
   "note": "constant wrist rotation (marker-fit gauge freedom) removed; marker predictions unchanged"
  }
 },
 "release": {
  "release_path": "actions/locomanipulation/LM21/session_032",
  "family": "locomanipulation",
  "primitive": "LM21",
  "source_session": "20261027/LM21/20261027_035312_session43"
 },
 "task": {
  "primitive": "LM21",
  "instruction": "Carry the box straight from one end of the room to the other, set it down, then bring it back. Keep going until the operator says stop; one object at a time, and do not rush between trips."
 },
 "objects": [
  {
   "name": "BigBox2",
   "object_type": "BigBox",
   "source": "mocap",
   "pose_frame": "rigid_body"
  }
 ]
}