{"schemaVersion":"1.0","id":"live-aircraft-over-london","dataset":"live-aircraft","title":"Everything in the air over London","description":"Every transponder currently reporting inside the M25, and which way it is going.","methodology":"ADS-B positions from the OpenSky Network, bounded to 51.25–51.70°N and 0.55°W–0.30°E. Aircraft are classed by vertical rate: descending faster than 2 m/s counts as arriving, climbing faster than 2 m/s as departing. Positions are proxied through an API route and cached for LIVE_CACHE_TTL seconds, so OpenSky is polled once per interval no matter how many people are watching. Coverage depends on volunteer receivers — this is what the network can see, not a guaranteed census of the sky.","category":"aviation","categoryLabel":"Aviation","cadence":"live","placeholder":false,"landingPage":"https://londongraph.com/g/live-aircraft-over-london","markdown":"https://londongraph.com/g/live-aircraft-over-london/index.html.md","source":{"name":"OpenSky","url":"https://opensky-network.org/","licence":"OpenSky Network terms of use","licenceUrl":"https://opensky-network.org/about/terms-of-use"},"observations":null,"areaStatistics":null,"visualizations":[{"id":"overview","label":"Map","description":"Every transponder currently reporting inside the M25, and which way it is going.","url":"https://londongraph.com/g/live-aircraft-over-london","renderer":"primary","default":true,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"altitude","label":"Altitude","description":"Show the distribution of reported barometric altitudes.","url":"https://londongraph.com/g/live-aircraft-over-london?view=altitude","renderer":"live-summary","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null},{"id":"flight-phase","label":"Flight phase","description":"Separate aircraft that are descending, climbing, level or on the ground.","url":"https://londongraph.com/g/live-aircraft-over-london?view=flight-phase","renderer":"live-summary","default":false,"timeControl":"inherit","datasets":[],"transform":null,"controls":null,"metrics":[],"caveat":null}],"availability":"metadata-only","note":"Live values are intentionally served by rate-limited application feeds, not this crawlable record."}