The U.S. Army has started a three-week test of an updated air and missile defense sensor. The Limited User Test (LUT) of the Sentinel A4 AN/MPQ-64A4 is being conducted by 30 soldiers and 85 government civilians and contractors at White Sands Missile Range. The test is being held to determine if the Sentinel A4 can replace the Sentinel A3 AN/MPQ-64A3 as the U.S. Army’s primary intermediate air and missile defense sensor.
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