{
  "schema_version": 1,
  "date": "2026-10-24",
  "author": "Jonathan Yantis",
  "license": "CC-BY-4.0",
  "method": "Finite relative PPS: causal delivered clock queries at captured GNSS edges; separately sampled TX measured by adjacent-PPS interpolation at downstream RX. RMS includes bias. No trimming or post-window offset refit.",
  "firmware": {
    "W12": {
      "version": "0.2.10",
      "commit": "b5ecbb0b13dbab955282327afe16e4d08d24d823",
      "receive_adjustment_ns": 7671,
      "relay_adjustment_ns": 4026
    },
    "T096": {
      "version": "0.15.169",
      "commit": "1a1fa96df54116b877a34cc7fa4445e91c2860f8",
      "receiver_adjustment_ns": 10543
    }
  },
  "warmup_seconds": 120,
  "window_seconds": 300,
  "window_count": 2,
  "w12": {
    "logged": 600,
    "eligible": 522,
    "unscorable": 78,
    "reasons": {
      "source_unavailable": 78
    },
    "phase_ns": {
      "n": 522,
      "mean": 40.695402298850574,
      "rms": 60.32766532085536,
      "centered_std": 44.534384859340335,
      "minimum": -87,
      "maximum": 180,
      "max_abs": 180,
      "p95_abs": 122,
      "p99_abs": 156,
      "ge100": 56,
      "ge200": 0
    }
  },
  "downstream": {
    "logged": 600,
    "eligible": 451,
    "unscorable": 149,
    "reasons": {
      "expired": 36,
      "no_map": 109,
      "reference_ineligible": 4
    },
    "phase_ns": {
      "n": 451,
      "mean": -5.545454545454546,
      "rms": 61.92157617868208,
      "centered_std": 61.67276165647705,
      "minimum": -189,
      "maximum": 211,
      "max_abs": 211,
      "p95_abs": 120,
      "p99_abs": 154,
      "ge100": 48,
      "ge200": 1
    }
  },
  "sampled_tx": {
    "logged": 120,
    "eligible": 58,
    "unscorable": 62,
    "reasons": {
      "missing_followup_match": 61,
      "no_pps_bracket": 1
    },
    "phase_ns": {
      "n": 58,
      "mean": 13.931034482758621,
      "rms": 108.3057613012091,
      "centered_std": 107.40607156615809,
      "minimum": -226,
      "maximum": 200,
      "max_abs": 226,
      "p95_abs": 200,
      "p99_abs": 226,
      "ge100": 26,
      "ge200": 3
    }
  },
  "windows": [
    {
      "window": 1,
      "w12": {
        "logged": 300,
        "eligible": 222,
        "unscorable": 78,
        "reasons": {
          "source_unavailable": 78
        },
        "phase_ns": {
          "n": 222,
          "mean": 67.66666666666667,
          "rms": 81.08042942681074,
          "centered_std": 44.668313805854126,
          "minimum": -87,
          "maximum": 180,
          "max_abs": 180,
          "p95_abs": 141,
          "p99_abs": 164,
          "ge100": 53,
          "ge200": 0
        }
      },
      "downstream": {
        "logged": 300,
        "eligible": 178,
        "unscorable": 122,
        "reasons": {
          "expired": 35,
          "no_map": 87
        },
        "phase_ns": {
          "n": 178,
          "mean": -10.275280898876405,
          "rms": 58.55704027947566,
          "centered_std": 57.64846545001281,
          "minimum": -163,
          "maximum": 150,
          "max_abs": 163,
          "p95_abs": 116,
          "p99_abs": 154,
          "ge100": 14,
          "ge200": 0
        }
      },
      "sampled_tx": {
        "logged": 60,
        "eligible": 34,
        "unscorable": 26,
        "reasons": {
          "missing_followup_match": 25,
          "no_pps_bracket": 1
        },
        "phase_ns": {
          "n": 34,
          "mean": 19.852941176470587,
          "rms": 103.31547916597066,
          "centered_std": 101.39008315381597,
          "minimum": -226,
          "maximum": 200,
          "max_abs": 226,
          "p95_abs": 200,
          "p99_abs": 226,
          "ge100": 14,
          "ge200": 2
        }
      }
    },
    {
      "window": 2,
      "w12": {
        "logged": 300,
        "eligible": 300,
        "unscorable": 0,
        "reasons": {},
        "phase_ns": {
          "n": 300,
          "mean": 20.736666666666668,
          "rms": 38.31209556610897,
          "centered_std": 32.21501702967456,
          "minimum": -76,
          "maximum": 121,
          "max_abs": 121,
          "p95_abs": 71,
          "p99_abs": 97,
          "ge100": 3,
          "ge200": 0
        }
      },
      "downstream": {
        "logged": 300,
        "eligible": 273,
        "unscorable": 27,
        "reasons": {
          "no_map": 22,
          "expired": 1,
          "reference_ineligible": 4
        },
        "phase_ns": {
          "n": 273,
          "mean": -2.4615384615384617,
          "rms": 64.02014335018904,
          "centered_std": 63.97280346351191,
          "minimum": -189,
          "maximum": 211,
          "max_abs": 211,
          "p95_abs": 121,
          "p99_abs": 168,
          "ge100": 34,
          "ge200": 1
        }
      },
      "sampled_tx": {
        "logged": 60,
        "eligible": 24,
        "unscorable": 36,
        "reasons": {
          "missing_followup_match": 36
        },
        "phase_ns": {
          "n": 24,
          "mean": 5.541666666666667,
          "rms": 115.00525350319147,
          "centered_std": 114.87165996837031,
          "minimum": -214,
          "maximum": 187,
          "max_abs": 214,
          "p95_abs": 195,
          "p99_abs": 214,
          "ge100": 12,
          "ge200": 1
        }
      }
    }
  ],
  "w12_sources": [
    {
      "source": "source-A",
      "logged": 182,
      "eligible": 182,
      "unscorable": 0,
      "reasons": {},
      "phase_ns": {
        "n": 182,
        "mean": 76.52197802197803,
        "rms": 86.84427771263097,
        "centered_std": 41.0647714109367,
        "minimum": -7,
        "maximum": 180,
        "max_abs": 180,
        "p95_abs": 147,
        "p99_abs": 165,
        "ge100": 53,
        "ge200": 0
      }
    },
    {
      "source": "source-B",
      "logged": 340,
      "eligible": 340,
      "unscorable": 0,
      "reasons": {},
      "phase_ns": {
        "n": 340,
        "mean": 21.51764705882353,
        "rms": 39.37564191820355,
        "centered_std": 32.9762344958076,
        "minimum": -87,
        "maximum": 121,
        "max_abs": 121,
        "p95_abs": 73,
        "p99_abs": 97,
        "ge100": 3,
        "ge200": 0
      }
    },
    {
      "source": "unavailable",
      "logged": 78,
      "eligible": 0,
      "unscorable": 78,
      "reasons": {
        "source_unavailable": 78
      },
      "phase_ns": {
        "n": 0
      }
    }
  ],
  "gnss_prediction": {
    "raw": {
      "n": 600,
      "mean": -0.08166666666666667,
      "rms": 35.21654440742305,
      "centered_std": 35.216449715375276,
      "minimum": -185,
      "maximum": 129,
      "max_abs": 185,
      "p95_abs": 77,
      "p99_abs": 166,
      "ge100": 23,
      "ge200": 0
    },
    "mapped": {
      "n": 600,
      "mean": -0.08333333333333333,
      "rms": 41.85263830791714,
      "centered_std": 41.85255534479214,
      "minimum": -209,
      "maximum": 131,
      "max_abs": 209,
      "p95_abs": 85,
      "p99_abs": 156,
      "ge100": 23,
      "ge200": 1
    }
  },
  "utc_fraction_checks_passed": 522,
  "missing_logged_pps": 0,
  "timing_gate": "NOT_MET",
  "gm_work_started": false,
  "offsets_refit": false,
  "limits": [
    "W12 source transition: 182 eligible on source-A, 78 unavailable, then 40 on source-B; window 2 has 300 on source-B. Populations remain separate.",
    "451/600 downstream PPS eligible; maximum 211 ns. Sampled TX 58/120 scored, 61 missing matches and one lacking PPS brackets; maximum 226 ns. Radio diagnostic sequences also have gaps; they do not prove loss-free RF delivery.",
    "All 600 logged PPS observations per device retained; status counter accounting does not independently prove every physical pulse.",
    "GNSS prediction evaluates its own causal predictor and does not establish delivered BLE clock accuracy. GNSS witnesses do not train the BLE clock.",
    "Calibration transfer to other W12 units/profiles remains unmeasured. RF endpoint, GNSS, GPIO/cable delays and absolute UTC association/accuracy remain unqualified. No physical W12 output-pin accuracy or GM qualification is asserted."
  ]
}