Distance Measuring Equipment Aviation

Distance measuring equipment dme is defined as a combination of ground and airborne equipment which gives a continuous slant range distance from station readout by measuring time lapse of a signal transmitted by the aircraft to the station and responded back.

Distance measuring equipment aviation.

It operates in the frequency range from 960 to 1215 mhz band. Slant range distance will always be slightly greater than the flight planned distance to a dme station because it also includes the aircraft s height above the station the dme display in an aircraft 6 000 feet directly above a dme transmitter will read one nautical mile. You ll usually find dme equipment co located with a vor or ils loc. Some ndb stations have colocated dme but not many.

Distance measuring equipment dme requires both ground based and in aircraft equipment. On the other hand dme is transmitted over uhf. Distance measuring equipment often called dme is one of the most valuable pieces ofavionics in the aircraft the main purpose of the dme is to display your distance from avortac vor dme or localizer. Dme principles of operation the dme will measure the distance in a straight line to the ground beacon the slant range not the distance from a point on the ground vertically below the aircraft ground range.

Approved by major civil aviation authorities. The difference is generally insignificant except that when directly over a beacon. Operationally proven in over 160 countries worldwide. The interrogator in the aircraft transmits interrogating pulses to the dme station on the ground.

Operational notes on distance measuring equipment 2. Distance measuring equipment dme is a radio navigation technology that measures the slant range distance between an aircraft and a ground station by timing the propagation delay of radio signals in the frequency band between 960 and 1215 megahertz mhz. Navaids like vors and ils systems transmit their navigation signals over vhf. Dme distance measuring equipment dme is a transponder based radio navigation technology that measures distance between the equipment on ground and an aircraft by timing the propagation delay of vhf or uhf radio signals.

Faa dfs stna enav as well. Dme systemis made of two parts aircraft based interrogator and a ground beacon. It is used to obtain range measurements from an aircraft station to a ground station. Line of visibility between the aircraft and ground station is required.

The dme system consists of an interrogator on board an aircraft and a dme station on the ground. Distance measuring equipment dme is a system that is used in aviation for navigation purposes. More than 1 500 operational systems worldwide. The received pulses trigger the dme station to reply.