If you're talking about nuclear weapons, their major effect on satellites (Starfish Prime as the reference point) isn't EMP effects, but ionizing radiation—creating a persistent radiation belt of MeV electrons. (A physical process that took months to disable some satellites). Beyond that I don't know much.
At the point anyone is using nukes in LEO, things have gotten really out of control already.
If you're talking about nuclear weapons, their major effect on satellites (Starfish Prime as the reference point) isn't EMP effects, but ionizing radiation—creating a persistent radiation belt of MeV electrons. (A physical process that took months to disable some satellites). Beyond that I don't know much.