US FAA announced that a ground-based Wide-Area Augmentation System is now being used in Juneau, enabling controllers to track aircraft along the approach into the airport where radar coverage isn't possible owing to surrounding mountains. With Wide Area Multilateration, controllers safely can reduce separation between arriving aircraft to 5 nm. Currently, only one aircraft at a time can fly down the terrain-challenged flight path into Juneau. The system comprises a network of small ...

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