July 10,
2008: Last week, the U.S. Navy sent a
message, and conducted some anti-missile training, as two Aegis warships (one
off the coast of Israel, and the other in the Persian Gulf) practiced defeat a
combined missile attack, from Syria, Lebanon and Iran, against Israel.
So far,
the Aegis system has knocked down nearly 90 percent of the missiles fired
towards it. This includes shooting down a low flying space satellite. The Aegis
system consists of a modified version of the Standard anti-aircraft missile and
the Aegis radar system, that shoots down
ballistic missiles. This system, the RIM-161A, also known as the Standard
Missile 3 (or SM-3), has a range of over 500 kilometers and max altitude of
over 160 kilometers. The Standard 3 is based on the failed anti-missile version
of the Standard 2, and costs over three million dollars each. The Standard 3
has four stages. The first two stages boost the interceptor out of the
atmosphere. The third stage fires twice to boost the interceptor farther beyond
the earth's atmosphere. Prior to each motor firing it takes a GPS reading to
correct course for approaching the target. The fourth stage is the 20 pound
LEAP kill vehicle, which uses infrared sensors to close on the target and ram
it. The Aegis system only operates from warships (cruisers and destroyers that
have been equipped with the special software that enables the AEGIS radar
system to detect and track incoming ballistic missiles.
The recent
exercise mainly tested the communications and computer operations of the Aegis
systems in the two warships. No missiles were actually fired (although some
simulated ones were in a software version of the system, used for testing and
training.) Iran has threatened to fire missiles at Israel, if anyone attacks
Iranian nuclear weapons development facilities. Israel also has its own
anti-missile systems. The U.S. is most concerned about Iranian short range
missiles attacking U.S. bases in Iraq, or oil production facilities in nearby Arab
nations.
By the end
of the year, the U.S. Navy will have 18 ships equipped with the Aegis
anti-missile system. Japan also has four Aegis warships being equipped with
this anti-missile capability.
