{
  "description": "AC87 fixed ringdown inference problem. Synthetic whitened strain, white Gaussian noise of known per-sample standard deviation, known amplitude and phase. Teaching model, not a Kerr waveform or detector noise model.",
  "version": "ac87-ringdown-1",
  "sampleRateHz": 4096,
  "sampleCount": 128,
  "amplitude": 1.0,
  "phaseRadians": 0.0,
  "prior": { "frequencyHz": [200, 300], "dampingTimeMs": [2, 10] },
  "training": { "noiseSigma": [0.15, 0.6], "noiseSigmaDistribution": "log-uniform" },
  "grid": { "coarseCells": 64, "fineCells": 64, "windowMass": 0.99999 },
  "mismatch": {
    "overtone": { "frequencyRatio": 0.93, "dampingDivisor": 3.0, "phaseRadians": 1.0471975511965976, "note": "Schematic extra damped mode scaled with the main amplitude; ratios are teaching choices, not Kerr overtone values." },
    "glitch": { "centreMs": 20.0, "widthMs": 1.5, "frequencyHz": 275.0, "amplitude": 1.0, "note": "Sine-Gaussian transient with fixed amplitude in whitened units, independent of the signal amplitude." },
    "noise": { "note": "True noise standard deviation is sigma*(1+strength) while the analysis assumes sigma." }
  },
  "default": { "frequencyHz": 250, "dampingTimeMs": 6, "noiseSigma": 0.2, "mismatchKind": "overtone", "mismatchStrength": 0 }
}