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How Missile Defense Works (And Why It Fail)

MONews
8 Min Read

once ballistic missile Once launched into the air, defenders have only a few minutes to identify its exact trajectory and shoot it down.

The goal is, enemy warheadis usually inside a car-sized object flying around the edge of space at speeds several times the speed of sound.

In April and October, Iran launched two of the largest ballistic missile attacks in history against Israel. The world’s most advanced missile defense systems, deployed by Israel and the United States, stopped some, but not all, of the missiles.


Neither attack caused significant damage, but some Israeli and U.S. officials said they may have been lucky that the situation was not worse. After Israel attacked Iran last week, Iranian officials threatened another round of retaliation, although their plans remain unclear.


Here are some reasons why preventing a ballistic missile attack is difficult:

Ballistic missiles, like the one launched by Iran last month, leave the atmosphere and accelerate to incredible speeds before falling to Earth. Analysts estimate that Iran’s missiles took only about 12 minutes to reach Israel. But there was much less time to make important decisions about how to stop them.

Within seconds, satellite The heat signature produced by a missile launch must be detected. radar You need to find the missile and calculate its exact path.

Also known as defensive missiles interceptor To reach the incoming missile in time, you must fire immediately after it.

It’s hard enough with just one missile. But Iran fired. big volley Of those, nearly 200 ballistic missiles were launched in less than an hour last month. The goal appeared to be to overwhelm Israel’s defenses.


Radar can only track so many targets at once, and once emptied, launchers can require 30 minutes or more to reload.

Additionally, if future attacks are a concern, the target country may need to make urgent decisions. Stock up on valuable interceptors Only against incoming missiles that are likely to cause the most damage.

After Iran’s second shelling in October, Israel said its defense systems had shot down many of the missiles and that the damage from those that did hit appeared to be limited.

But satellite images show that bombardment using more advanced missiles has created dozens of craters at the Nevatim air base. If the missile had landed in a populated area, the casualties and destruction would have been enormous.

Israel’s best-known defense system, Iron Dome, was built to stop short-range rockets, but is too slow and limited for ballistic missiles. To achieve this, Israel relies on several advanced layers of defense designed to counter ballistic missiles at various stages of flight.

The most advanced systems, long-range interceptors like the Arrow 3, operate in space, where ballistic missiles like those launched by Iran spend most of their time. This is your first chance to stop the missile, but high above the atmosphere there is no room for error.

both interceptor and enemy missile Launch the power booster into space. Only two small vehicles remain, rushing towards each other.

What the Interceptor is after direct hit To destroy the warhead. The interceptor carries sensors to track enemy missiles and thrusters to move towards them. However, it takes less than a second for the interceptor to adjust until it detects a target a mile away.

Missiles like Iran’s latest missiles are only 3 feet wide They arrive at the base by the time they are in space, traveling about 2 miles per second.

If that’s not enough, some ballistic missiles bait To fool the interceptor. Debris left behind from the booster could also cause havoc.

It’s unclear how often upper-atmosphere interceptions actually work. Governments tend to avoid disclosing specific blocking rates, and even if blocking fails, there are good reasons to present a positive picture. The same goes for companies that manufacture expensive systems.

Combined with U.S. missile defense systems in the region, Israel now has the largest number of missile defense systems in the world. If outer layer defenses fail to stop the missiles, short-range systems that intercept missiles closer to the ground may get another chance.

But time goes by quickly. The closer a ballistic missile gets, the more dangerous it becomes. And even if an interception is successful at lower altitudes, the resulting debris can still be lethal.

Once a missile successfully re-enters the atmosphere, it often takes less than a minute to strike.


effective defense in the upper atmosphere An interceptor missile, like Israel’s Arrow 2 or the THAAD system recently sent to Israel by the United States, must be launched within seconds.

As the missile approaches the ground close range defense Like America’s Patriot system, it provides one last chance to stop it. However, these systems have a range of about 12 miles and can only protect a limited area.

Attackers can utilize a variety of tactics. Allows you to fire a cheaper salvo to distract enemies. Weapons timed to arrive at the same time Like a ballistic missile. While this is what Iran attempted in its April attack, Israel and its allies appear to have been able to sort out between faster and slower weapons by using other means of defense, such as fighter jets.

Israel’s retaliatory strikes against Iran last week targeted missile production sites and degraded Iran’s ability to produce missiles of the type it launched in October. The attack damaged at least one rocket production facility and a fuel mixer that makes propellant for Iran’s missile fleet.

It is unclear how Iran will respond and whether it will launch another ballistic missile, but if it does, the fundamental imbalance of the missile war will remain. In other words, launching a ballistic missile is much easier than stopping it. And building a ballistic missile is cheaper and faster than building an interceptor and shooting it down.

In a protracted conflict, the question could be which side will run out of missiles first.

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