I am at a loss as to how MIRVed ICBMs/SLBMs deploy their warheads during the re-entry phase, as well as to how the guidance systems work. Regrettably, good technical information on this matter is rather difficult to come by.
I understand that MIRVed re-entry vehicles use spin stabilization and gyroscopic guidance–and that said spinning is obscenely rapid–but in what manner are the individual warheads guided, once deployed? Obviously, each has its own inertial (?) guidance system, but I’m also left wondering what kind of propulsion each missile has. Obviously a gravity-based system would not work.
At what approximate height are the warheads deployed? By what mechanism are they ejected? How do the warheads maintain their course when ejected from a rapidly spinning re-entry vehicle? Feel free to throw in any additional technical details. I’m sure the North Koreans won’t learn anything new.