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- SBIRS low altitude component consisting of SBIRS LEO satellites. The SBIRS Low component will be designed to provide precision midcourse tracking and discrimination data to support early interceptor commit, in-flight target updates, and target object maps for a National Missile Defense architecture. The SBIRS Low component will also support the other mission areas of the SBIR system. (Evolution of the Space and Missile Tracking System).
DoD Missile Defense Agency - Cite This Source - This Definition
- SBIRS GEO, SBIRS HEO, SBIRS High, SBIRS LEO, Space Based Infrared System (SBIRS)