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The core constraint in ballistic missile detection is sensor geometry: no single nation's network covers a missile's full parabolic arc, from boost phase through midcourse to terminal descent, at useful fidelity.
Coverage depends on ground-based radar, space-based infrared systems, and the pre-negotiated data links that hand signals between them.
China's rare ballistic missile launch into the Pacific has given analysts the concrete observable they needed to argue that Asia-Pacific regional powers must accelerate the defense agreements that close those handoff gaps.
The detection architecture that makes alliances load-bearing When a ballistic missile traverses international waters, every neighboring country's intelligence apparatus attempts to collect and cross-reference its signature data.
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