{
  "$schema": "og-gate-1.0",
  "module": "M01",
  "variant": "baseline",
  "dim": "R5-5",
  "value": 11.1,
  "unit": "dB_SNR_headroom_over_bottomlock",
  "threshold_pass": 6.0,
  "threshold_obj": 12.0,
  "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",
    "R7"
  ],
  "evidence": "days=90.0 coating=silicone FR=10.0 t_film=150um f=500.0kHz two_way_abs=0.90dB scatter=0.00dB total_loss=0.90dB SNR_clean=20.0dB SNR@face=19.10dB lock_thr=8.0dB headroom=11.10dB bottom_lock_lost=False",
  "tool": "gate_dvl_fouling.py (Schultz-FR + DVL bottom-track link budget, analytical)",
  "standard": "Schultz 2007 FR model + DVL bottom-track SNR; ASME V&V 20; NASA-STD-7009B CAS",
  "ts": "2026-07-10T13:26:17.681193+00:00"
}