The Bear and the Dragon - Tom Clancy [306]
The Aegis system had real possibilities. The SPY radar system was first-rate, and though the computer that managed the information was the flower of 1975 technology—a current Apple Macintosh had it beat by a good three orders of magnitude in all categories of performance—intercepting a ballistic warhead wasn't a question of computing speed so much as kinetic energy—getting the kill vehicle to the right place at the right time. Even that wasn't so great a feat of engineering. The real work had been done as far back as 1959, with the Nike Zeus, which had turned into Spartan and shown great promise before being shitcanned by the 1972 treaty with the Soviet Union, which was, belatedly, just as dead as the Safeguard system, which had been aborted at half-built.
Well, the fact of the matter was that MIRV technology had negated that entire defense concept. No, you had to kill the ICBM in boost phase to kill all the MIRVs at once, and do it over the enemy's territory so that if he had a primitive arming system he'd only fry his own turf. The method for doing that was the Brilliant Pebbles system developed at Lawrence-Livermore National Laboratory, and though it had never been given a full-up test, the technology was actually pretty straightforward. Being hit by a matchstick traveling at fifteen thousand miles per hour would ruin your entire day. But that would never happen. The drive to fund and deploy such a system had died with all the ballistic launchers. In a way, it was a pity, Gregory thought. Such a system would have been a really cool engineering accomplishment—but it had little practical application today. The PRC retained its land-based ballistic launchers, but there were only ten or so of them, and that was a long way from the fifteen hundred the Soviets had once pointed at America. The Chinese had a missile submarine, too, but Gregory figured that CINCPAC could make that go away if he had to. Even if it was just tied alongside the pier, one two-thousand-pound smart bomb could take it out of play, and the Navy had a lot of those.
So, he thought, figure the PRC gets really pissed at Taiwan, and figure the Navy has an Aegis cruiser tied alongside so that its sailors can get drunk and laid in the city, and those folks in Beijing pick that moment to push the button on one of their ICBMs, how can the Navy keep its cruiser from turning into slag, and oh, by the way, keep the city of Taipei alive … ?
The SM-2-ER had almost enough of the right ingredients to handle such a threat. If the missile was targeted on where the cruiser was, cross-range was not an issue. You just had to put the interceptor on the same line of bearing, because in essence the inbound rack wasn't moving at all, and you just had to put the SAM in the same place—Spot X—that the RV was going to be, at Time Y. The Aegis computer could figure where and when that was, and you weren't really hitting a bullet with a bullet. The RV would be about a meter across, and the kill-zone of the SAM's warhead would be about, what? Three meters across? Five? Maybe even eight or ten?
Call it eight, Al Gregory thought. Was the SM-2 that accurate? In absolute terms, probably yes. It had ample-sized control surfaces, and getting into the line of a jet aircraft—what the SM-2 had been designed to kill—had to take into account the maneuverability of the aircraft (pilots would do their damnedest to avoid the things), and so the eight-meter globe of destruction could probably be made to intercept the inbound RV in terms of pure geometry.
The issue was speed. Gregory popped open another Diet Coke from the room's minibar and sat back on the bed to consider how troublesome that issue was. The inbound RV, at a hundred thousand feet, would be traveling at about sixteen thousand miles per hour, 23,466 feet per second, eight times the speed of a rifle bullet, 7,150 meters per