Knowra Signals intelligence Signals intelligence Signals intelligence is intelligence derived from intercepted communications, electronic emissions, and other signals. It includes collecting signals and analyzing them to assess their meaning and significance.
Communications intelligence : Intelligence derived from intercepted communications, such as voice calls, messages, and data transmissions. This branch analyzes the content and patterns of communications.
Radio direction finding : The use of radio measurements to estimate the direction or location of a transmitter. Direction finding can help locate the source of an intercepted signal.
Zimmermann Telegram : A 1917 German diplomatic message proposing a military alliance with Mexico against the United States. British interception and decryption helped bring the message into public view.
Human intelligence : Intelligence gathered from human sources, including interviews, informants, and recruited agents. It relies on people rather than intercepted signals as its primary source.
Electronic intelligence : Intelligence derived from non-communications electromagnetic emissions, including radar signals. This branch examines electronic emissions that are not primarily messages.
Frequency analysis : The examination of signal frequencies to identify, characterize, or separate transmissions. Frequency characteristics help distinguish signals and identify their possible sources.
Bletchley Park : The British wartime codebreaking center where encrypted Axis communications were analyzed during the Second World War. Its work on intercepted German communications produced intelligence known as Ultra.
Imagery intelligence : Intelligence derived from images collected by satellites, aircraft, or other sensors. It focuses on visual and geospatial evidence rather than signal emissions.
Foreign instrumentation signals intelligence : Intelligence derived from signals emitted by foreign weapons, spacecraft, and other systems. This specialized branch studies signals from foreign equipment and tests.
Signal processing : The mathematical analysis and transformation of signals to extract useful information. Signals intelligence relies on processing techniques to clean, classify, and interpret collected data.
Show all 23