Knowra Radio navigation Radio navigation Radio navigation determines position or direction by measuring radio signals transmitted by beacons, satellites, or other stations. Systems use signal timing, direction, or phase to guide travel.
Radio direction finding : A method for locating a radio transmitter by measuring the direction from which its signal arrives. Bearing measurements let an aircraft or ship navigate toward or away from a beacon.
Global Positioning System : A United States satellite navigation system that provides positioning, navigation, and timing services worldwide. GPS is the best-known satellite-based radio navigation system.
Radio wave : An electromagnetic wave with frequencies used for communication, sensing, and navigation. Radio waves carry the timing, phase, and directional information that navigation systems measure.
Inertial navigation system : A navigation system that estimates motion and position by integrating measurements from accelerometers and gyroscopes. Inertial systems need no external radio signals but accumulate position error over time.
Radio triangulation : A method of locating a point by combining bearings measured from multiple known locations. Intersecting bearings can establish position when one signal direction is insufficient.
VOR : A short-range radio navigation system that lets aircraft determine their bearing from a ground station. VOR stations provide pilots with directional guidance along established airways.
Electromagnetic spectrum : The full range of electromagnetic radiation, organized by frequency or wavelength. Radio navigation occupies a portion of the spectrum chosen for propagation and system design.
Dead reckoning : A method of estimating current position from a known starting point, direction, speed, and elapsed time. Dead reckoning can continue without radio reception, though errors grow between position fixes.
Trilateration : A method of locating a point from its measured distances to multiple known points. Systems such as GPS derive position from signal travel times, not intersecting bearings.
Distance Measuring Equipment : An aviation system that estimates an aircraft's distance from a ground station by measuring radio signal delay. DME supplies the range component often paired with VOR bearings.
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