Definition
A computerized air traffic control system used in certain enroute facilities to process radar and flight data, display aircraft targets with associated tags, and assist controllers in tracking and separating traffic over large airspace areas. It is a smaller, scaled-down version of the full EARTS used at sites with lower traffic volume, such as offshore or remote enroute centers.
Plain English
A computer system that helps enroute air traffic controllers track aircraft on their radar screens. 'Micro' just means it is a smaller version of the full system, used in places that don't need the larger setup.
Context Anchor
Seen in descriptions of air traffic control equipment and radar services used by en route control centers.
Derivation
Micro' comes from the Greek mikros, meaning 'small.' Here it signals that this is a reduced-scale version of the full EARTS, suited to facilities with fewer aircraft to track.
Why Pilots Care
It supplies controllers with reliable aircraft positions, supporting safe separation and smooth handoffs between sectors.
Intuition Check
Do not read “micro” as meaning the system tracks small aircraft or covers only a tiny area. Here, “micro” refers to the computer system design, while “en route” refers to aircraft already underway between airports.
Example Sentence 1
The remote enroute facility uses Micro-EARTS to track aircraft transiting its airspace.
Example Sentence 2
Handoffs between centers were completed smoothly thanks to continuous tracking by the Micro Enroute Automated Radar Tracking System.