MDANews Release www.mda.mil
mda.info@mda.mil
7100 Defense Pentagon
Washington, DC 20301-7100
Airborne Laser Testbed Successful in Lethal Intercept Experiment
The Missile Defense Agency demonstrated the potential use of directed energy to defend against ballistic missiles when the Airborne Laser Testbed (ALTB) successfully destroyed a boosting ballistic missile. The experiment, conducted at Point Mugu Naval Air Warfare Center-Weapons Division Sea Range off the central California coast, serves as a proof-of-concept demonstration for directed energy technology. The ALTB is a pathfinder for the nationâ€™s directed energy program and its potential application for missile defense technology.
At 8:44 p.m. (PST), February 11, 2010, a short-range threat-representative ballistic missile was launched from an at-sea mobile launch platform. Within seconds, the ALTB used onboard sensors to detect the boosting missile and used a low-energy laser to track the target. The ALTB then fired a second low-energy laser to measure and compensate for atmospheric disturbance. Finally, the ALTB fired its megawatt-class High Energy Laser, heating the boosting ballistic missile to critical structural failure. The entire engagement occurred within two minutes of the target missile launch, while its rocket motors were still thrusting.
This was the first directed energy lethal intercept demonstration against a liquid-fuel boosting ballistic missile target from an airborne platform. The revolutionary use of directed energy is very attractive for missile defense, with the potential to attack multiple targets at the speed of light, at a range of hundreds of kilometers, and at a low cost per intercept attempt compared to current technologies.
Less than one hour later, a second solid fuel short-range missile was launched from a ground location on San Nicolas Island, Calif. and the ALTB successfully engaged the boosting target with its High Energy Laser, met all its test criteria, and terminated lasing prior to destroying the second target. The ALTB destroyed a solid fuel missile, identical to the second target, in flight on February 3, 2010.
[top of page]
The ALTB in flight. 
An infrared video of the Airborne Laser Testbed (right) disabling a threat-representative short-range ballistic missile (left) during the initial boost phase. 
The United States Missile Defense Agency have announced that their airborne laser system has successfully shot down a ballistic missile for the first time. In a test on Thursday the "Airborne Laser Testbed" (ALTB), a modified Boeing 747-400F, detected a boosting short-range missile and tracked it using a low-energy laser. A second low-energy laser was used to measure and compensate for atmospheric disturbance, before the aircraft's High Energy Laser was used to destroy the target.

The missile was liquid-fuelled and said to be "threat-representative", possibly similar to a Scud. It was launched from sea, and shot down by the ALTB within two minutes. In a second test less than an hour later, a solid-fuel missile launched from a ground location was also successfully hit by the High Energy Laser, but deliberately not destroyed. A similar missile was destroyed on February 3.

In a press release announcing the successful tests the Missile Defense Agency said: "The revolutionary use of directed energy is very attractive for missile defense, with the potential to attack multiple targets at the speed of light, at a range of hundreds of kilometers, and at a low cost per intercept attempt compared to current technologies."

The ALTB is described as a "pathfinder" for the use of directed energy in missile defense. It is designed to operate at high altitudes above the clouds, and to detect and destroy ballistic missiles soon after launch whilst they are still in their boosting phase. The aircraft is provided by Boeing, the main laser by Northrop Grumman, and the control systems by Lockheed Martin.

"Through its hard work and technical ingenuity, the government-industry team has produced a breakthrough with incredible potential," stated Greg Hyslop, vice president of Boeing Missile Defense Systems. He said that the experiment had "made history". 

The US has been working on the program since 1996, and has faced numerous problems in that time. The megawatt-class High Energy Laser is known as the chemical oxygen iodine laser (COIL), and consists of six modules, each as large as an SUV. The sheer weight of chemicals needed was almost too much for the 747 jet. The laser also had problems with accuracy due to atmospheric conditions.

February's tests were originally scheduled to be carried out in 2002. The amount spent getting the project to this stage has also risen from a planned US$1 billion to $7.3 billion. Last year, Secretary of Defense Robert Gates cut the program back to a single jet for research, suggesting it would not see actual deployment.

“The reality is that you would need a laser something like 20 to 30 times more powerful than the chemical laser in the plane right now to be able to get any distance from the launch site to fire,” Gates told Congress. "So, right now the jet would have to orbit inside the borders of Iran in order to be able to try and use its laser to shoot down that missile in the boost phase."

Gates also raised concerns at the large number of planes that would be required, and the ensuing cost. However, he said that directed energy weapons still had potential for missile defense.