The major impact is that NORAD would go blind.
NORAD depends on elements of the U.S. space surveillance network, to which we contribute one satellite. It contains access to information from the defence support program, which has infrared satellites in both geosynchronous and polar orbits that can identify all rocket or missile launches. That's followed by the ground-based ballistic missile early warning network, which is cued from the DSP. Taking out the DSP is a dangerous thing to do in other strategic considerations.
Basically, NORAD would be unable to see. It would be very difficult, if not highly improbable, for it to undertake its primary mission of aerospace warning, that is, integrated tactical warning and attack assessment, in which they notify national command authorities if the United States and Canada are under attack and what the nature of that attack is.
It would be catastrophic.