FISINT

FISINT (Foreign Instrument Signature Intelligence) is a type of intelligence gathering focused on intercepting and analyzing signals or data from foreign space, missile, or aircraft systems. It involves examining the technical signatures and communications from foreign hardware, such as telemetry, tracking, or control signals, to understand their capabilities and intentions. This information helps national security agencies assess potential threats, monitor technological developments, and maintain strategic advantages. Essentially, FISINT provides insights into the technical details of a country's advanced systems by intercepting electronic emissions, offering valuable intelligence beyond traditional intercepts or imagery.