Signals intelligence
Strategic intelligence (STRATINT) pertains to the collection, processing, analysis, and dissemination of intelligence that is required for forming policy and military plans at the national and international level. Much of the information needed for strategic reflections comes from Open Source Intelligence. Other sources include traditional HUMINT (especially in recent years), Signals intelligence including ELINT, MASINT which overlaps with SIGINT/ELINT to some degree, and 'National technical means of verification' (e.g. spysats).