How do ICBM early warning systems differentiate between a real threat and a launch of a normal rocket intended to go to space?

Question

How do ICBM early warning systems differentiate between a real threat and a launch of a normal rocket intended to go to space?

In: 2759

Answer 1

I feel like people are getting overly technical with this, the actual reason is because rockets going into space are PLANNED. Any country with detection capabilities already knows when a rocket is going into space.

It’s the unannounced ones we pay attention to.

Source: Military