ADS-B Exchange · Schema

LastPositionDataResponse

When the regular lat and lon are older than 60 seconds they are no longer considered valid, this will provide the last position and show the age for the last position. Aircraft will only be in the aircraft json if a position has been received in the last 60 seconds or if any message has been received in the last 30 seconds.

AviationFlight TrackingADS-BAircraftReal-TimeMilitaryMLAT

Properties

Name	Type	Description
lat	number
lon	number
nic	integer	Navigation Integrity Category (2.2.3.2.7.2.6)
rc	integer	Radius of Containment, meters; a measure of position integrity derived from NIC and supplementary bits. (2.2.3.2.7.2.6, Table 2-69)
seen_pos	number	How long ago (in seconds before “now”) the position was last updated

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "LastPositionDataResponse",
  "type": "object",
  "description": "When the regular lat and lon are older than 60 seconds\nthey are no longer considered valid, this will provide\nthe last position and show the age for the last position.\nAircraft will only be in the aircraft json if a position\nhas been received in the last 60 seconds or if any message\nhas been received in the last 30 seconds.",
  "additionalProperties": false,
  "properties": {
    "lat": {
      "type": "number",
      "format": "float",
      "nullable": true
    },
    "lon": {
      "type": "number",
      "format": "float",
      "nullable": true
    },
    "nic": {
      "type": "integer",
      "description": "Navigation Integrity Category (2.2.3.2.7.2.6)",
      "format": "int32",
      "nullable": true
    },
    "rc": {
      "type": "integer",
      "description": "Radius of Containment, meters; a measure of position integrity\nderived from NIC and supplementary bits. (2.2.3.2.7.2.6, Table 2-69)",
      "format": "int32",
      "nullable": true
    },
    "seen_pos": {
      "type": "number",
      "description": "How long ago (in seconds before \u201cnow\u201d) the position was last updated",
      "format": "double",
      "nullable": true
    }
  }
}