{
  "concept": "4F.1",
  "title": "Canonical Ankara height-aware obstruction audit",
  "captured_at": "2026-09-17",
  "source": "ATOM_RUN_CANONICAL_HEIGHT_AUDIT=1 go test ./raytracer -run TestCanonicalAnkaraHeightAwareClassificationAuditWhenDatasetIsEnabled -count=1 -v",
  "dataset": {
    "footprints": 161784,
    "towers": 451,
    "height_evidence": {
      "observed_tag": {"count": 1108, "pct": 0.68},
      "derived_from_levels": {"count": 4966, "pct": 3.07},
      "fallback_only": {"count": 155710, "pct": 96.25},
      "unavailable": {"count": 0, "pct": 0.0}
    }
  },
  "scenario": {
    "frequency_ghz": 28,
    "tx_height_m": 25,
    "rx_height_m": 1.5,
    "radius_m": 400,
    "beam_width_deg": 120,
    "rays_per_cell": 72,
    "cells": 6,
    "audited_paths": 432,
    "classifier_id": "footprint-height-los-v1",
    "terrain_status": "terrain_unavailable"
  },
  "old_2d_to_new_height_aware": {
    "los_to_los": 29,
    "nlos_to_nlos": 248,
    "unknown_to_unknown": 155,
    "los_to_nlos": 0,
    "nlos_to_los": 0,
    "other": 0
  },
  "canonical_representatives": {
    "no_footprint_intersection": "tower=LTE-35084 ray=47 old=los new=los",
    "conservative_2d_unknown_height": "tower=LTE-35084 ray=0 old=nlos new=nlos unknown=6",
    "known_obstruction_with_unknown_height_conservative": "tower=LTE-35104 ray=0 old=nlos new=nlos blocking=2 cleared=1 unknown=10",
    "receiver_inside_building": "tower=LTE-35084 ray=43 old=unknown new=unknown",
    "transmitter_inside_building": "tower=LTE-313110 ray=0 old=unknown new=unknown"
  },
  "controlled_transition_ledgers": [
    {"case": "known_roof_block", "old_2d": "nlos", "new_state": "nlos", "basis": "known_height_obstruction"},
    {"case": "known_roof_clear", "old_2d": "nlos", "new_state": "los", "basis": "known_height_roofs_cleared"},
    {"case": "unknown_fallback", "old_2d": "nlos", "new_state": "nlos", "basis": "conservative_2d_unknown_height"},
    {"case": "exact_roof_touch", "old_2d": "nlos", "new_state": "nlos", "basis": "known_height_obstruction"},
    {"case": "target_facade_exclusion", "old_2d": "nlos", "new_state": "los", "basis": "no_footprint_intersection"}
  ],
  "urban_short_range_optimization": {
    "baseline": {
      "network_score": 13509330.8,
      "composite_score": 0.391373,
      "unique_demand_buildings": 12,
      "unique_residential_buildings": 82,
      "propagation_reach_score": 18330.7658,
      "overlap_buildings": 10,
      "served_demand_weight": 430.0,
      "score": 39.1373
    },
    "optimized": {
      "azimuths_deg": [150, 300, 110, 300, 290, 100],
      "network_score": 32568641.1,
      "composite_score": 0.489145,
      "unique_demand_buildings": 29,
      "unique_residential_buildings": 137,
      "propagation_reach_score": 22141.1276,
      "overlap_buildings": 0,
      "served_demand_weight": 1115.0,
      "score": 48.9145,
      "pareto_frontier_size": 23
    }
  },
  "performance": {
    "height_aware_optimizer_elapsed_seconds": 18.484,
    "pre_change_reference_seconds": 17.78,
    "pre_change_reference": "concept-4d-canonical-comparison.json urban_short_range wall-time measurement",
    "comparison_note": "The pre-change artifact is a full canonical wall-time measurement; the post-change gated audit timer isolates OptimizeNetworkContext. Treat the figures as a bounded performance ledger, not a strict apples-to-apples benchmark."
  }
}