{
  "$schema": "og-gate-1.0",
  "module": "M01",
  "variant": "baseline",
  "dim": "R5-6",
  "value": 3.0,
  "unit": "dB_receive_SNR_budget_headroom",
  "threshold_pass": 0.0,
  "threshold_obj": 1.0,
  "rag": "GREEN",
  "cas_score": 1,
  "cas_factors": {
    "verification": 2,
    "validation": 1,
    "input_pedigree": 2,
    "results_uncertainty": 1,
    "results_robustness": 1,
    "use_history": 2,
    "ms_management": 2,
    "people_qual": 2
  },
  "cas_rollup_policy": "OG-conservative-min (stricter than NASA-7009B App.B.4)",
  "validated_vs_reality": "PENDING",
  "risk_trace": [
    "R5",
    "R6"
  ],
  "evidence": "days=90.0 coating=silicone FR=10.0 t_film=150um f=15.0kHz absorption=0.00dB rvr=0.00dB dSNR_foul=0.00dB budget=3.0dB headroom=3.00dB | NOTE: stacks onto R6 passive SNR deficit",
  "tool": "gate_hydrophone_fouling.py (Schultz-FR + passive RVR loss, analytical)",
  "standard": "Schultz 2007 FR model + passive receive SNR; ASME V&V 20; NASA-STD-7009B CAS",
  "ts": "2026-07-10T13:26:17.829310+00:00"
}