Signals intelligence before the Second World War/Related Articles
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- Intelligence collection management : Assigning questions to various collection techniques, reflecting the techniques available and the priority of the information need. Includes the process of categorizing information learned for subsequent analysis, and assigning probabilities of accuracy to the raw information
- Radar : (acronym for "radio detection and ranging") A technique used for detecting and tracking targets, navigation, imagery, and special applications.
- Radio : Transmission and reception of information, which can be voice, data or imagery over electromagnetic radiation in free space (i.e., wireless). The information is modulated onto a carrier wave
- Telephony : Add brief definition or description
- William Friedman : Possibly the greatest cryptologist in history, he pioneered the application of mathematics to cryptanalysis and built the U.S. Army Signal Intelligence Service technical base.
- SIGINT ground-based platforms : Fixed, transportable or mobile facilities, on land, which contain signals intelligence sensors
- SIGINT ship-based platforms : Signals intelligence collection systems mounted on surface ships
- Herbert Yardley : Add brief definition or description
- Communications Act of 1934 : Add brief definition or description
- Cryptanalysis : The sub-field of cryptology which deals with breaking into existing codes and ciphers.
- Direction finding : Finding the location of an electromagnetic emitter, either by the crossed bearings from directional antennas from various known points, or by time of arrival or time difference of arrival of the signal at those points
- Goniometry : Add brief definition or description
- SIGINT in the Second World War : Add brief definition or description
- SIGINT from 1945 to 1989 : Add brief definition or description
- SIGINT from 1990 to the present : Add brief definition or description
- SIGINT aircraft-based platforms : An aircraft or unmanned aerial vehicle (UAV) that carries signals intelligence sensors
- Traffic analysis : Traffic analysis is a branch of signals intelligence, inferring useful information from messages without actually reading them.