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Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of signals, whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly used in communication (electronic intelligence—abbreviated to ELINT). [1]
Electronic intelligence (ELINT) – gathered from electronic signals that do not contain speech or text (which are considered COMINT) Foreign instrumentation signals intelligence (FISINT) – entails the collection and analysis of telemetry data from a missile or sometimes from aircraft tests; formerly known as telemetry intelligence or TELINT
SIGINT Systems appears to be a British firm that makes the "HARVESTER family of SIGINT database applications (that) provide unique and cost-effective solutions to a wide range of collection requirements" [35] and has a website that can serve as a basic tutorial on the technical aspects of what SIGINT systems collect.
A United States Air Force Boeing RC-135 aircraft in flight Royal Air Force Hawker Siddeley Nimrod A52 Oste, an Oste class ELINT and reconnaissance ship, of the German Navy. Signals intelligence operational platforms are employed by nations to collect signals intelligence, which is intelligence-gathering by interception of signals, whether between people (i.e., COMINT or communications ...
In signals intelligence (SIGINT), non-communications signals are any signals sent out for a purpose other than communicating information. This includes radar emissions and emissions from instrumentation (which provide information, but are not sent out for the purpose of providing information to others).
A SIGINT Activity Designator (or SIGAD) identifies a signals intelligence (SIGINT) line of collection activity associated with a signals collection station, such as a base or a ship. For example, the SIGAD for Menwith Hill in the UK is USD1000. [ 1 ]
The Examination Unit (XU) was established during the Second World War, in June 1941, as a branch of the National Research Council.It was the first civilian office in Canada solely dedicated to decryption of communications signals; until then, SIGINT was entirely within the purview of the Canadian military, and mostly limited to intercepts.
Since it deals with signals that have communicational content, it is a subset of Communications Intelligence (COMINT), which, in turn, is a subset of SIGINT. Unlike general COMINT signals, the content of FISINT signals is not in regular human language, but rather in machine to machine (instrumentation) language or in a combination of regular ...