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+ "session": "EgoMotionActions/20260916/LM08/20260916_040540_session51",
+ "session_id": "20260916_040540_session51",
+ "primitive": "LM08",
+ "batch": "20260916",
+ "participant": "wangzhixin",
+ "participant_source": "manifest",
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+  "model": "offset (median of windows)",
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+ "units": {
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+  "quaternions": "xyzw, Nokov global"
+ },
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+  "date": "2026-09-08"
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