Acoording to Eurocontrol, a Standard Instrument Departure Route (SID) is a standard ATS route identified in an instrument departure procedure by which aircraft should proceed from take-off phase to the en-route phase. A Standard Terminal Arrival Route (STAR) is a pre-planned instrument flight rule (IFR) air traffic control procedure. STARs provide transition from the en-route structure to an outer fix or an arrival way-point in the terminal area.
Aeroficial Intelligence is monitoring for each flight movement, whether the aircraft has taken a certain SID/STAR. This information is used to see how the current airspace structure and procedures are utilised and which routings are mostly used. Putting this information in combination with Continuous Climb or Descent Operation, emission savings can be derived.