{
  "data_source": "NUMERICAL_SIMULATION",
  "parameter_origin": "Hypothetical scenarios; not estimated from phone or human measurements",
  "seed": 20261030,
  "projection": {
    "width_px": 1280, "height_px": 720, "f_px": 1000,
    "card_width_cm": 6.3, "card_height_cm": 8.8, "centre_offset_cm": 5,
    "depth_cm": 10, "z_cm": [25, 30, 40, 60, 80, 120], "phases": 16
  },
  "uncertainty": {
    "C_px_cm": 1500, "Z0_cm": 50, "u_Z0_cm": 0.5, "u_p0_px": 0.2,
    "sigma_p_px": [0.2, 0.5, 1.0], "Z_cm": [25, 30, 40, 60, 80, 100, 120],
    "draws": 20000, "normal_cutoff_sd": 5,
    "sigma_definition": "Assumed uncertainty of the reported diameter statistic, not single-frame noise"
  },
  "range": {
    "epsilon": 0.075, "k": 5.4, "Pmin_px": 90, "d_cm": 0, "sigma_p_px": 0.5,
    "cases": [
      {"case": "A", "C_px_cm": 1500, "depth_cm": 9, "tolerance": 0.1},
      {"case": "B", "C_px_cm": 2250, "depth_cm": 9, "tolerance": 0.1},
      {"case": "C", "C_px_cm": 3000, "depth_cm": 9, "tolerance": 0.1},
      {"case": "D", "C_px_cm": 1500, "depth_cm": 4, "tolerance": 0.1},
      {"case": "E", "C_px_cm": 1500, "depth_cm": 4, "tolerance": 0.02},
      {"case": "F", "C_px_cm": 1500, "depth_cm": 4, "tolerance": 0.01}
    ]
  }
}