MASINT, or Measurement and Signature Intelligence, is a type of intelligence gathering that focuses on the detection and analysis of physical phenomena. It involves collecting data from various sensors to identify unique signatures, such as radar, acoustic, or electromagnetic emissions, which can indicate the presence of specific activities or objects. Unlike traditional intelligence methods, MASINT provides insights that are not solely reliant on human observation or signals. It plays a crucial role in national security by helping to monitor military activities, detect missile launches, and assess environmental changes, thereby enhancing situational awareness for decision-makers.