{
  "MEASURED": {
    "new_R138_measurements": [],
    "note": "The original teams measured imaging and spectra; R138 reads their records and does not relabel their measurements as ours."
  },
  "SOURCE_DERIVED": {
    "records": "R138_EVIDENCE_LEDGER.json and R138_TIMING.json",
    "operations": "Transcription, identity comparison and subtraction of published frame labels."
  },
  "ASSUMED": {
    "used_for_conditional_explanation_only": [
      "Optically thin additive line emission",
      "Nonrelativistic line-centroid velocity",
      "A two-component illustration with a stationary background"
    ],
    "not_assigned": [
      "Front height or dome",
      "Local normal",
      "Upstream rest for E08",
      "Front emissivity fraction",
      "Front dwell time",
      "Shock identity",
      "FAST/SLOW label"
    ]
  },
  "MODEL_DERIVED": {
    "new_E08_states": null,
    "illustrative_relation": "v_centroid = f_line * v_front_LOS for the stated two-component model; f_line is not measured for E08.",
    "logical_result": "An upper limit on a diluted centroid cannot bound the intrinsic front flow without a positive lower bound on its line-emission weight."
  }
}