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In Historic Test, US Navy Shoots Down an Intercontinental Ballastic Missile


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"In a historic test, a U.S. Navy guided missile destroyer shot down an intercontinental ballistic missile (ICBM) warhead aimed at a patch of ocean off the Hawaiian Islands," reports Popular Mechanics: Once the missile launched, a network of sensors picked it up. The data was then handed off to the guided missile destroyer USS John Finn, which launched a SM-3 Block IIA interceptor. Just as the ICBM released a [simulated] nuclear warhead, the SM-3 released an Exoatmospheric Kill Vehicle (EKV) designed to smash itself into the incoming warhead. Infrared cameras recorded a visible explosion as the EKV took out the simulated nuclear warhead. Most types of ballistic missiles are basically small payload space rockets designed to boost nuclear warheads into low-Earth orbit. Once in space, the warhead coasts through orbit at several thousand miles per hour — the so-called midcourse phase when the warhead is midway between its launch point and target. The warhead then de-orbits into a trajectory that sends it plunging toward its target. Meanwhile, space-based infrared sensors pick up the hot launch plume of the ballistic missile. A launch alert is passed on to ground-based long range radars, which search the skies for the incoming threat. As the missile falls away and the warhead continues on to its target, missile defense radars track the target, plot its trajectory, and alert any "shooters" in the flight path capable of shooting down the warhead. The shooter then launches an interceptor, and the EKV steers itself into the warhead path... The article includes video of the test, and concludes that the ability to shoot down missiles is "terrible news for China" — while adding this "could very well cause Beijing to increase its nuclear arsenal."

Read more of this story at Slashdot.

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https://tech.slashdot.org/story/20/11/21/035251/in-historic-test-us-navy-shoots-down-an-intercontinental-ballastic-missile?utm_source=rss1.0mainlinkanon&utm_medium=feed

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