metering fix

metering fix

A fix along the route from which aircraft will be metered prior to entering the terminal airspace. This fix is established at a distance from the airfield to facilitate a profile descent 10,000 ft (3 km) above the airfield's elevation.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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Thus, the proximity relationships of aircraft with some key waypoints (e.g., intersection points, metering fix) in the sector severely affect the complexity of air traffic situations.
Specifically, Flight 1 is approaching sector S3 from sector S1; Flight 2 flies from sector S3 to sector S1 and is flying away from the metering fix, whose reference distance [mathematical expression not reproducible] is set as 15 km.
Among all air traffic situations faced by the controller, in addition to the between-aircraft relationships, there are also relationships between aircraft and airspace structure (e.g., an aircraft is approaching a metering fix or deviating from the authorized airway).
Modeling Air Traffic Situation Complexity with a Dynamic Weighted Network Approach
Metering fix timelines show ETAs to the metering fixes; other timelines show ETAs to active runways.
Arranged round its perimeter are four metering fixes. Beyond it are en route sectors.
Controlling with SASS

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