Carnegie
Corporation
of New York
Vol. 2/No. 3
Fall 2003
 


Foundation Roundup



National Association of Secretaries of State


StoryCorps


American Physical Society (APS)

Effectiveness of Boost-Phase Missile Defense in Doubt
The American Physical Society (APS), a professional society of physicists, has released results from a study of boost-phase defense technology, part of the U.S. Ballistic Missile Defense System. The study concludes that boost-phase defense would not be effective against attacks on America by long-range intercontinental ballistic missiles (ICBMs), which are capable of carrying nuclear, biological and chemical payloads.

Boost-phase defense is part of a layered system for intercepting enemy missiles at
different trajectory points during flight. “Boost-phase” refers to an early segment of the launch, when engines continue to burn as the missile gains velocity. To retaliate, heat-seeking rockets or lasers would intercept the missile at this stage, disabling it before the midcourse and re-entry flight phases were reached. But as this study showed, the window for launching interceptors, often less than 30 seconds, was inadequate.

The study focused specifically on defense against missiles launched from North Korea and Iran, countries that may become capable of firing long-range rockets at the United States. Geopolitical boundaries for both areas preclude locating interceptors close enough to the enemy missiles to be generally effective.

The only scenario in which boost-phase intercept could potentially be feasible is if enemy missiles are launched from ships near the U.S. coast. In that case, interceptors based within 40 kilometers of the enemy ships might be able to make an intercept.

Analyzing performance times of both liquid and solid-propellant enemy missiles produced varying results, as did a comparison of land, sea and air-based missiles. However, the best possible defense technologies of the next decade still would not provide sufficient response time for interception.

 


The Goldman Sachs Foundation


Public Library of Science (PLoS)


New America Foundation (NAF)


Investing in Democracy


Henry J. Kaiser Family Foundation

Harvard School of Public Health