Technology / Aviation / Transponder: An airborne transmitter that responds to ground-based interrogation signals to provide air traffic controllers with more accurate and reliable position information than would be possible with 'passive' radar: may also provide air traffic control with an aircraft's altitude.

Transponder Beacon

Technology / Radar / Transponder Beacon: A beacon having a transponder. Also called responder beacon. MORE


Technology / Radar / Interrogator: A radar transmitter which sends out a pulse that triggers a transponder. An interrogator is usually combined in a single unit with a responsor, which receives the reply from a transponder and produces MORE

Digital Compression

Technology / Television (TV) / Digital Compression: A process of translating video images into a digital code which takes up less transmission space than the original signal would have. This allows more channels per satellite transponder: typical compr MORE

Responder Beacon

Technology / Radar / Responder Beacon: Transponder beacon. MORE

Class B Airspace

Technology / Aviation / Class B Airspace: Airspace area around the busiest U.S. hub airports (i.e. Chicago O’Hare), typically to a radius of 20 nautical miles and up to 10,000 feet AGL (Above Ground Level). Operations within Class B airspac MORE

Radio Frequency Identification (RFID)

Technology / Computers / Radio Frequency Identification (RFID): RFID first appeared in tracking and access applications during the 1980s. It is a method of remotely storing and retrieving data using devices called RFID tags/transponders and is coming into increasi MORE