(U) NSA SIGINT Overview
(U) NSA/CSS SIGINT FAQs
(U) Interception Capabilities
(U) Traffic Analysis Capabilities
(U) TEMPEST
(U) ECHELON
SIGINT Operational Platforms by Nation
Eye on SIGINT: The New Electronic Warfare
Prophet
Tactical SIGINT: Tagging, Tracking and Locating via Low-level Voice Intercept (LLVI), ground surveillance radar (GSR), direction finding (DF), Precision Geo-Location (PGL), and electronic attack (EA). Techniques include Watson-Watt, pseudo-doppler, correlative interferometer, TDOA, FDOA, beam forming, null steering, and higher-order statistics approaches. Documents
(U) FM 3-05.102 Army Special Operations Forces Intelligence (Inactive Publication)
(U) AR 190-53 Interception of Wire and Oral Communications for Law Enforcement Purposes
(U) FM 2-22.401 Multi-Service Tactics, Techniques and Procedures for Technical Intelligence Operations
(U) FM 3-90.15 Sensitive Site Operations