Ground Radar Sited on top of the Tower and used in foggy weather this provides a ground image of the airport. Vehicles and airplanes are clearly shown including airborne aircraft below 200ft.
Ground Wave Electromagnetic waves with frequencies up to 1.6 MHz. They propagate following the bending of the Earth.
Ground-Based Augmentation and Integrity Technique GAIT is a ground-based component of the Global Navigation Satellite System to monitor the functional integrity of GNSS. It may include a combination of facilities and techniques such as wide area differential GNSS and pseudo ranging signals.
Ground-to-Air Communication One way communication from stations or locations on the surface of the earth to aircraft.
Group Simulation A real-time simulation involving several individual or team simulations simultaneously.
Group Training Either the provision of stimuli or the analysis and the processing of the feedback cannot be made separately for each student.
Guidance Statements which are designed to direct the required actions. Guided Analytical Simulation Analytical simulation with interactive assessment, comments and guidance. Guided Computer Based Training Interactive guided learning making use of a multimedia computer. Guided Part-Task Practice A Part Task Practice (PTP) with questions, feedback, comments, indications and assessment. Guided Pre-simulation Pre-simulation with interactive assessment, comments and guidance. Guided Simulation There is extensive interaction between the student and the computer in the form of questions, feedback, comments, instructions and assessment. This guidance assumes the existence of a theoretical model against which the student can be compared. Guided Skill Acquisition Skill acquisition with interactive assessment, comments and guidance. Gyroscope An inertial device for measuring change of attitude (pitch rate, roll rate, and yaw rate); gyroscopes usually consist of a rotating mass; gyroscopes are usually included in inertial sensors.
H
Hamming Code Error correcting code having four information bits and three check bits per character; named after
R.W. Hamming of Bell Labs. Hands On A supervised practice on real equipment which is not in operation. Hard Approach A specific approach to systems theory using a technological or mathematical basis as a foundation for an effective solution to the problem(s). Harmonisation (ATC system) Harmonisation is the attainment of a comparable level of operational system performance throughout a given area by utilisation of compatible facilities, standards, specification and procedures. Harmonised Comparable levels of performance. Heading The direction in which the longitudinal axis of an aircraft is pointed, expressed in clockwise degrees from North. Usually magnetic heading (with respect to the magnetic north pole), sometimes true heading (with respect to the geographic north pole). Height
The vertical distance of a level, a point, or an object considered as a point, measurement from a specified datum.
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