This report examined the Department of Defense's (DOD) plans to develop a follow-on system to the Defense Support Program (DSP), including budget implications. DSP is a strategic surveillance and warning satellite system with an infrared capability to detect ballistic missile launches (intercontinental and submarine-launched). It provides near real-time detection information in support of DOD's tactical warning and attack assessment (TWAA) mission. Its primary users are (1) the North American Aerospace Defense Command, which is responsible for assessing potential attacks on North America; (2) the national command authorities, who are responsible for making retaliatory decisions; and (3) other major military commands, which participate in the decision-making process and are responsible for strategic offensive forces.


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