Courtesy of Alaska District, this 90-foot (27m) diameter radar installation monitors the northern sky. Its construction was part of the Clear Radar Upgrade to make all Ballistic Missile Early Warning System radars phased-array rather than mechanical. http://www.hq.usace.army.mil/cepa/pubs/jul00/story8.htm
Courtesy of Alaska District, this 90-foot (27m) diameter radar installation monitors the northern sky. Its construction was part of the Clear Radar Upgrade to make all Ballistic Missile Early Warning System radars phased-array rather than mechanical. htt