This report summarizes the work done in FY03 to develop a systematic engineering-based approach for constructing a high-level architecture for a Ballistic Missile Defense System (BMDS). We developed six UML use cases to identify the external agents and systems that are involved in a typical missile-defense scenario. Based on these use cases, we developed the top level of a distributed architecture of a BMDS and conducted simulation studies to analyze the network requirements to support such an architecture. We also developed a physical model to analyze the sensor requirements to successfully detect and track a ballistic missile throughout the boost phase.
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