Ballistic Missile Early Warning System

Three of the huge AN/FPS-50 radars, BMEWS Site 2, near Anderson, Alaska, in 1962.

4 AN/FPS-50 detection reflectors at Thule J-site (replacement by an AN/FPS-120 with

The Thule J-site BMEWS station's detection arcs of 200°[43] were a missile warning

The RCA 474L Ballistic Missile Early Warning System (BMEWS, "474L System", Project 474L) was a USAF "Big L" Cold War system of radar, computer, and communications systems that included the first operational ballistic missile detection radar. The network of 12 radars for detecting "a mass ballistic missile attack launched on northern approaches [for] 15 to 25 minutes warning time" also provided Project Space Track satellite data (e.g., about 1/4 of SPADATS observations).

单词	Ballistic Missile Early Warning System
释义	Ballistic Missile Early Warning System 英语百科 Ballistic Missile Early Warning System The RCA 474L Ballistic Missile Early Warning System (BMEWS, "474L System", Project 474L) was a USAF "Big L" Cold War system of radar, computer, and communications systems that included the first operational ballistic missile detection radar. The network of 12 radars for detecting "a mass ballistic missile attack launched on northern approaches [for] 15 to 25 minutes warning time" also provided Project Space Track satellite data (e.g., about 1/4 of SPADATS observations).
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