See wide area augmentation system.
Wingtip vortices that are created when an airplane generates lift. When an airplane generates lift, air spills over the wingtips from the high pressure areas below the wings to the low pressure areas above them. This flow causes rapidly rotating whirlpools of air called wingtip vortices or wake turbulence.
The boundary area formed when a warm air mass contacts and flows over a colder air mass. Warm fronts cause low ceilings and rain.
An area containing hazards to any aircraft not participating in the activities being conducted in the area. Warning areas may contain intensive military training, gunnery exercises, or special weapons testing.
See weather and radar processing.
A controllable valve in the tailpipe of an aircraft reciprocating engine equipped with a turbocharger. The valve is controlled to vary the amount of exhaust gases forced through the turbocharger turbine.
A designated geographical location used for route definition or progress-reporting purposes and is defined in terms of latitude/longitude coordinates.
See wind correction angle.
A device that provides real-time, accurate, predictive, and strategic weather information presented in an integrated manner in the National Airspace System (NAS).
Details surface conditions as derived from METAR and other surface observations.
The force exerted by an aircraft from the pull of gravity.
A differential global positioning system (DGPS) that improves the accuracy of the system by determining position error from the GPS satellites, then transmitting the error, or corrective factors, to the airborne GPS receiver.
The angle between the desired track and the heading of the aircraft necessary to keep the aircraft tracking over the desired track.
Indicators that include a wind sock, wind tee, or tetrahedron. Visual reference will determine wind direction and runway in use.
A sudden, drastic shift in windspeed, direction, or both that may occur in the horizontal or vertical plane.