|
|
Article: Radio Direction Finding Equipment
- Article from:
- Encyclopedia of Espionage, Intelligence, andSecurity
CopyrightCOPYRIGHT 2004 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Radio Direction Finding Equipment
One of the earliest military applications for radio was in direction-finding (DF), which makes it possible to locate the positions of enemy aircraft and ships using four major components: an antenna, a receiver, a processor or processors, and a control and output system. Examples of radio DF equipment in use at the beginning of the twenty-first century include the OUTBOARD (Organizational Unit Tactical Baseline Operational Area Radio Detection) system of the U.S. Navy. Direction finding often uses triangulation, which is based on laws of plane trigonometry.
Direction finding and triangulation.
A direction finder can be any electronic device used to ...