SkyFollower

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Rules & Areas ​

Rules ​

Rules tell SkyFollower which aircraft to alert on. They are stored in Redis (config:rules) and edited through the UI. A rule fires at most once per flight per rule identifier. All conditions within a rule must match simultaneously (AND logic).

Example rules.example.json entry:

json
[
  {
    "identifier": "heavy-arrivals",
    "name": "Heavy aircraft arriving",
    "description": "Any heavy aircraft descending below 5000 ft",
    "enabled": true,
    "conditions": [
      { "type": "wake_turbulence_category", "operator": "equals", "value": "heavy" },
      { "type": "altitude", "operator": "maximum", "value": 5000 },
      { "type": "vertical_speed", "operator": "maximum", "value": -100 }
    ]
  }
]

Available condition types: altitude, heading, velocity, vertical_speed, area, date, ident, squawk, military, operator_airline_designator, aircraft_type_designator, aircraft_registration, aircraft_icao_hex, aircraft_powerplant_count, wake_turbulence_category, matched_rules.

See the Processor docs for operator and constraint details.

Areas ​

Named geographic polygons used with the area condition type. Stored in Redis (config:areas) as a GeoJSON FeatureCollection and edited through the UI's map editor.

Example areas.example.json:

json
{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": { "name": "Airport Approach" },
      "geometry": {
        "type": "Polygon",
        "coordinates": [[
          [-84.45, 33.60],
          [-84.35, 33.60],
          [-84.35, 33.70],
          [-84.45, 33.70],
          [-84.45, 33.60]
        ]]
      }
    }
  ]
}