Most satellite systems don't use leap seconds; you don't need leap seconds to have satellites. And leap seconds don't really "sync time with the earth"; that's

Most satellite systems don't use leap seconds; you don't need leap seconds to have satellites. And leap seconds don't really "sync time with the earth"; that's not how any of this works. Whether it's now 13:04:00 or 13:04:27 is somewhat arbitrary and all leap seconds do is maintain a certain arbitrary definition.