{
  "model": "PTT + pulse-contour physics scrutiny for contactless BP",
  "ptt": {
    "baseline_ms": 78.57142857142858,
    "sensitivity_ms_per_mmHg": 0.5,
    "required_resolution_for_1mmHg_ms": 0.5,
    "required_resolution_for_5mmHg_ms": 2.5,
    "required_resolution_for_10mmHg_ms": 5.0,
    "esp32_max_csi_rate_hz": 1000,
    "esp32_max_temporal_resolution_ms": 1.0,
    "esp32_typical_csi_rate_hz": 100,
    "esp32_typical_temporal_resolution_ms": 10.0
  },
  "spatial_resolution": {
    "carotid_femoral_distance_m": 0.55,
    "fresnel_envelope_5m_link_m": 0.39515292398428903,
    "fresnel_envelope_2m_link_m": 0.2499166527731462,
    "sites_resolvable_5m_link": false,
    "sites_resolvable_2m_link": true,
    "comment": "Single-link CSI cannot spatially separate two body sites. PTT requires multi-link multistatic with severely ill-posed inverse problem."
  },
  "snr": {
    "breath_phase_deg": 46.08,
    "pulse_phase_deg": 1.728,
    "motion_phase_deg": 11.52,
    "breath_vs_pulse_amp_ratio": 26.666666666666664,
    "hr_band_snr_db": 20.0,
    "bp_contour_required_snr_db": 25.0,
    "bp_contour_feasibility": "INFEASIBLE"
  },
  "vs_baseline": {
    "arm_cuff_accuracy_mmHg": 2.0,
    "published_csi_bp_mae_mmHg": 10.0,
    "ratio_worse": 5.0
  }
}