{
  "UTC": "2026-11-10T08:54:14.745104+00:00",
  "case": "random42",
  "seed": 42,
  "source_count": 1,
  "flue_count": 1,
  "site": {
    "longitude": -122.89276123046875,
    "latitude": 49.4591064453125,
    "native_cell_y_x": [
      67,
      62
    ],
    "ground_height_ASL_m": 1305.000244140625,
    "local_resolved_slope": 0.04778471409701046,
    "surrounding_5x5_peak_m": 2637.018798828125,
    "world_east_north_km": [
      3.7328772487797544,
      19.73979248389229
    ],
    "selected_from_terrain_only": true
  },
  "weather_source": "C:\\Users\\ASUS\\Desktop\\Agent_contact\\execution\\pollution_mountain_sameTerrain1km_v6\\epssm05\\history",
  "weather_source_plan_SHA256": null,
  "weather_reuse": "New same-terrain1km weather after its own complete36h validation, never the prior3km wind trajectory",
  "weather_hours": 36,
  "weather_spinup_hours": 12,
  "pollutant_hours": 24,
  "initial_background": false,
  "other_source_emissions": false,
  "stack": {
    "height_AGL_m": 76.2,
    "diameter_m": 2.0,
    "exit_velocity_m_s": 33.0,
    "exit_temperature_K": 668.15
  },
  "kg_s": 0.003973236935565703,
  "hypothetical_source": true,
  "regional_output_grid": {
    "nx": 123,
    "ny": 93,
    "dx_degrees": 0.0033333333333333335,
    "dy_degrees": 0.0033333333333333335,
    "longitude_center": -122.89276123046875,
    "latitude_center": 49.4591064453125
  },
  "near_field": "Same native96cubed residence binning and finite-density thermal rise. Only g1 published; other native diagnostic bins create no emission.",
  "rendering": "Crop original mountain scene around this site, retain nearby original buildings, place one original factory model at the sole new outlet. No other source smoke.",
  "playback": {
    "hours": 24,
    "default_seconds": 15,
    "adjustable": true
  },
  "limits": "Same hypothetical source and inherited FCC prior; same physical HGT sampled from qualified terrain on a1km solver grid. Parameterized YSU/FLEX turbulence, no building CFD/LES. Frozen November4 GFS scenario, not current observations.",
  "weather_grid_m": [
    3000,
    1000
  ],
  "numerical_dt_parent_child_s": [
    3,
    1
  ],
  "epssm": 0.5,
  "particle_budget": 300000,
  "original3km_site_sampling": {
    "longitude": -122.89276123046875,
    "latitude": 49.4591064453125,
    "native_cell_y_x": [
      67,
      62
    ],
    "ground_height_ASL_m": 1305.000244140625,
    "local_resolved_slope": 0.04778471409701046,
    "surrounding_5x5_peak_m": 2637.018798828125,
    "world_east_north_km": [
      3.7328772487797544,
      19.73979248389229
    ],
    "selected_from_terrain_only": true
  }
}