{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/flightradar24/main/json-schema/flight-position-light.json",
  "title": "FlightPositionLight",
  "description": "Lightweight real-time or historical aircraft position data point from the Flightradar24 API.",
  "type": "object",
  "required": ["fr24_id", "lat", "lon", "track", "alt", "gspeed", "vspeed", "squawk", "timestamp", "source"],
  "properties": {
    "fr24_id": {
      "type": "string",
      "description": "Flightradar24 unique flight identifier (hexadecimal).",
      "example": "34242a02"
    },
    "lat": {
      "type": "number",
      "minimum": -90,
      "maximum": 90,
      "description": "Latitude in decimal degrees.",
      "example": 51.4706
    },
    "lon": {
      "type": "number",
      "minimum": -180,
      "maximum": 180,
      "description": "Longitude in decimal degrees.",
      "example": -0.4619
    },
    "track": {
      "type": "integer",
      "minimum": 0,
      "maximum": 360,
      "description": "True heading in degrees.",
      "example": 270
    },
    "alt": {
      "type": "integer",
      "description": "Altitude in feet.",
      "example": 35000
    },
    "gspeed": {
      "type": "integer",
      "minimum": 0,
      "description": "Ground speed in knots.",
      "example": 450
    },
    "vspeed": {
      "type": "integer",
      "description": "Vertical speed in feet per minute (negative = descent).",
      "example": 0
    },
    "squawk": {
      "type": "string",
      "pattern": "^[0-7]{4}$",
      "description": "Transponder squawk code (4-digit octal).",
      "example": "7700"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 date-time of the position fix.",
      "example": "2024-01-15T10:30:00Z"
    },
    "source": {
      "type": "string",
      "description": "Data source type.",
      "enum": ["ADSB", "MLAT", "RADAR", "FLARM", "ESTIMATED"],
      "example": "ADSB"
    },
    "hex": {
      "type": ["string", "null"],
      "pattern": "^[0-9A-Fa-f]{6}$",
      "description": "ICAO 24-bit Mode S transponder address in hexadecimal.",
      "example": "400A10"
    },
    "callsign": {
      "type": ["string", "null"],
      "maxLength": 8,
      "description": "ATC callsign.",
      "example": "BAW123"
    }
  },
  "additionalProperties": false
}