The Wide Area Augmentation System is an air navigation aid developed by the Federal Aviation Administration to augment the Global Positioning System, with the goal of improving its accuracy, integrity
WAAS system overview
WAAS reference station in Utqiagvik, Alaska
WAAS ground uplink station (GUS) in Napa, California
Microwave landing system
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The microwave landing system is an all-weather, precision radio guidance system intended to be installed at large airports to assist aircraft in landing, including 'blind landings'. MLS enables an app
Wide Area Augmentation System
…ILS system is composed of 180 different transmitting antennas at each point built. For some time the FAA and NASA developed a much improved system, the microwave landing system (MLS). The entire MLS system for a particular approach was isolated in one or two boxes located beside the runway, dramatically reducing the cost of…
The NASA 737 research aircraft on the Wallops runway in 1987 with the microwave landing system equipment in the foreground
An MLS azimuth guidance station with rectangular azimuth scanning antenna with DME antenna at left
An MLS elevation guidance station