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How the US Knew Iranian Missiles Were Coming Before They Hit - Best News

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How the US Knew Iranian Missiles Were Coming Before They Hit

On Tuesday, Iran launched more than a dozen missiles targeting two Iraqi military bases housing American soldiers. The attack was retaliation for the US drone strike that killed Qasem Soleimani, a top-ranking Iranian military general. In a televised speech on Wednesday, President Donald Trump said “minimal damage was sustained” during the attack and that no American or Iraqi lives were lost. Considering that Iran has developed missiles that are accurate to within a few tens of meters, it’s remarkable that all personnel at the base emerged unscathed.

According to Trump, this had nothing to do with luck or bad aim. Instead, he attributed it to “an early warning system that worked very well.” The US has a vast network of radars and satellites dedicated to tracking missile launches around the globe, which allowed troops stationed at the Iraqi bases to take cover before the missiles struck their targets. The system worked as intended, but as the missile technology of America’s adversaries continues to improve, some experts wonder if the country’s first line of defense will be able to keep up.

America’s missile warning system harkens back to the early days of the Cold War, when the threat of a Soviet nuclear attack kept the world on edge. By the early 1960s, the US had a network of a dozen ground-based radars concentrated around the Arctic and several infrared satellites capable of detecting the launches of Russian intercontinental ballistic missiles that could deliver a nuclear warhead to the US mainland. The ground-based radars would constantly send pulses of high-frequency radio waves toward the horizon; if a missile was launched, the radio waves would be reflected off the missile back to the radar antenna, while the satellites would search for heat signatures from the missiles.

Although the fundamental methods for detecting a missile launch haven’t changed all that much in the past 50 years, today’s missile warning systems are vastly more accurate and responsive. One of the biggest improvements in early warning technology has been seen in space systems, which keep a constant watch for missile launches across the entire globe. At present, the US has four missile-tracking infrared satellites in geosynchronous orbits—meaning they never change position relative to the surface of the Earth—and two additional infrared missile detection systems likely hosted on classified National Reconnaissance Office satellites. In the case of the Iranian attack, it was almost certainly one of these satellites that gave the military a heads-up that missiles were on their way.

“It must have been space-based or a manned aircraft,” says Riki Ellison, founder and chair of the nonprofit Missile Defense Advocacy Alliance. “Radars are limited by the horizon and mountains so you won’t be able to detect a missile until it clears a certain elevation. You need something directly overhead.”

Once a satellite detects a possible missile launch, it triggers an alert at the Missile Warning Center, run by the US Space Command out of the Cheyenne Mountain Air Force Station in Colorado. There, military analysts work to confirm that the detection is legit and process the trajectory of the missile to determine where it will strike. With this information in hand, Space Command can determine whether a missile intercept is possible or necessary. How long the whole process takes, from detection to direction, depends on the launch location and target. In the case of the Iranian attack, US officials say troops had hours of advance warning of an impending attack from communication and signals intelligence, but the warning after the missile launch was likely only a few minutes. No attempt was made to intercept the missile; instead, troops at the targeted bases were ordered to disperse.

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The US missile warning system works great for ballistic missiles like those used by Iran, whose trajectories can be calculated with an extremely high degree of accuracy once they’re launched. It’s not well equipped to handle newer kinds of missiles. “What we’re seeing is the threats becoming more complex, and the complexity manifests in terms of maneuverability,” says Tom Karako, director of the Missile Defense Project at the Center for Strategic and International Studies.

More advanced missiles are able to change their trajectories mid-flight, which means “it won’t be in the place you think it’s going to be if you’re trying to engage it,” says Karako, who says maneuverable missile technology is within reach of Iran. Other US adversaries have still more advanced missiles like so-called “hypersonic glide vehicles” that take off like a normal missile and glide through the atmosphere at relatively low altitudes.

Defending against the combination requires the ability to continuously track a missile that is modifying its course and flying at relatively low altitudes. Right now that’s a sort of blind spot for the US early warning system. Radars are good at tracking objects well above the horizon, less so lower-flying hypersonic missiles, while satellites can detect a launch and calculate a trajectory, but not track an object during its flight (although two satellites currently in orbit are testing this capability).

The US Department of Defense is well aware of these shortcomings, and is making a concerted effort to update its technology. In 2018, the Air Force awarded Northrop Grumman an $866 million, five-year contract to upgrade three ground-based warning radar systems in the US. Last year, Congress approved a $160 million budget transfer to accelerate the development of a new generation of five missile-tracking satellites, the first of which is expected to launch in 2025.

Ellison says he also expects artificial intelligence to play a greater role in America’s missile warning system as the number of threats proliferates. “We’ve got to move faster, we can’t do the old school manual check out,” he says. Indeed, the US military is considering the use of machine learning to accelerate response times.

The Iranian missile attack was a grave reminder of the importance of a robust early warning system—its critical role in saving American and Iraqi lives may well have prevented the loss of countless others.


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