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Saturday, 22 October 2016

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If by "ballistic", you mean that ICBMs are not guided, the fact is that a great deal of money and brainpower was spent on ICBM guidance systems. Mainly INS, but with some star tracking assistance too.

https://books.google.com/books/about/Inventing_Accuracy.html?id=QymEXZIWEe8C

Good point, but still: not subject to local jamming at the target site, other than massive application of force (whack the incoming warheads with interceptors, set off your own nuke among them at high altitude, and so forth - fiddling with radio signals has no effect).
Hm. Apparently some RVs are steerable during reentry, too, but I presume they're using strictly inertial guidance. And are any of those actually installed on ICBMs? A quick search suggests not, but hasty Googlement is hardly definitive.

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