MissileThreat.com

Country:	USA
Basing:	Land
In Service:	2004

Details

The Ground-based Midcourse Defense (GMD) system, scheduled for deployment in September 2004, will be the United States’ first operational missile defense program capable of protecting all 50 states. GMD will detect and track long-range ballistic missiles in their boost phase, and destroy them during their midcourse phase, i.e. while the missiles are outside the atmosphere and at their highest trajectory. The Pentagon’s Missile Defense Agency is currently installing six interceptor missiles at Fort Greely in Alaska, and four at Vandenberg Air Force Base in California. Over 20 interceptors are scheduled for deployment over the next two years.

 

Although MDA developed many of GMD’s technologies during the 1980s and 1990s, the project officially began in 1998 with a $1.6 billion dollar contract to Boeing. Subcontractors include Raytheon, TRW, Lockheed Martin, Orbital Sciences Corporation, Bechtel, and Teledyne Brown Engineering. The project is currently undergoing extensive ground and flight tests.

 

Upon completion, GMD will consist of an complex array of synchronized components: Air Force Defense Support Program (DSP) satellites; Space Based Infrared System-High (SBIRS-High) satellites; the Space Tracking and Surveillance System (STSS); Upgraded Early Warning Radars (UEWRs); a Battle Management, Command, Control and Communications (BMC3) unit; the Sea-Based X-Band Radar (SBX); and Ground-Based Interceptor (GBI) missiles.

 

In a typical combat scenario, DSP and SBIRS-High satellites scan the horizon for hostile ballistic missile launches. Once a threat has been detected, the satellites estimate the missile’s flight path. The Space Tracking and Surveillance System monitors the threat as it makes its way across the globe, while Upgraded Early Warning Radars predict its final destination. This allows GMD to launch its interceptors as early as possible. The BMC3 unit on the ground integrates all surveillance and tracking information.

 

The interceptor missile itself, known as the Ground-Based Interceptor, is located in an underground silo. Once launched, the GBI streaks toward the target’s predicted location, receiving in-flight updates along the way. MDA is currently developing a Sea-Based X-Band Radar, scheduled for completion in 2005, to guide the GBI and allow it to differentiate between warheads and decoys. In the meantime, GMD will use existing radars located on the California coastline and the Alaskan Aleutian Islands.

 

At a predetermined point, the GBI releases its Exoatmospheric Kill Vehicle (EKV). The EKV is 55 inches long and weighs 140 pounds. It has its own infrared seeker, guidance system, and motor. As it closes in on its target, the EKV integrates data from the XBR with its on-board sensors and locks on to the enemy missile. The EKV continuously adjusts its flight path until it collides with the target (like a bullet hitting a bullet). The hit-to-kill impact causes complete destruction of the warhead, including any nuclear, chemical, or biological agents.

 

Since 1999, MDA has conducted seven GMD hit-to-kill tests. Five have been successful. The most recent test was on October 14, 2002, when a GBI from the Reagan Test Site in the central Pacific Ocean tracked and destroyed a target vehicle launched from Vandenberg Air Force Base at an altitude of 140 miles and a closing speed in excess of 15,000 miles per hour. Since then, MDA has also conducted two successful flight tests of the GBI boost vehicle. MDA plans to perform approximately seventeen more hit-to-kill intercepts over the next several years. MDA is also developing and constructing a Test Bed that will allow it to conduct rigorous EKV tests at angles, speeds, and conditions that closely resemble operational scenarios.

 

Despite these recent successes, several prominent Democrats have criticized MDA’s decision to deploy interceptor missiles at Fort Greely and Vandenberg. During the Democratic primaries, Sen. John Kerry (D-MA) voiced his complete opposition to the program. Sen. Tom Daschle (D-SD) echoed his colleague, adding, “There is such a rush to deploy that I think it’s going to be an embarrassment to them—to the country—if we rush to judgment, rush to the commitment of resources.” Sen. John Edwards (D-NC), and Ret. Army Gen. Wesley Clark also expressed their concerns.

 

All the same, GMD has received enthusiastic support from the Bush Administration and the Republican-controlled Congress, and there are no foreseeable delays to its deployment. Over the next year, in fact, MDA will decide whether or not to build a third GMD interceptor site. Europe is a top choice for its location, since it would provide increased defense against missiles launched from the Middle East. MDA acknowledges that this potential third site could be either land-based or sea-based, and could be fielded as early as 2006.

 

 

Sources

 

The Boeing Company.
“Boeing-Led Missile Defense Team Scores Another ‘Hit’; Successful System Test Includes Intercept Over Pacific.” Boeing Press Release, 14 October 2002.
“Boeing Wins $1.6 Billion-Dollar Contract From DoD’s Joint Program Office To Act As Lead System Integrator for National Missile Defense Program.” Boeing Press Release, 30 April 1998.
“Boeing-Orbital Team Successfully Launches Booster Vehicle.” Boeing Press Release, 16 August 2003.
“Boeing Conducts Successful GMD Integrated Flight Test,” Boeing Press Release, 26 January 2004.
Breen, Tom. “Missile Defense Agency; Countdown To Historic Deployment.” Armed Forces Journal, 1 April 2004.
Federation of American Scientists, Description of GBI.
Federation of American Scientists, Description of XBR.
Globalsecurity.org.
Missile Defense Agency.
Raytheon Company.
Selinger, Marc. “GMD Successfully Conducts Flight Test With New Booster.” Aerospace Daily, 28 January 2004.
Selinger, Marc. “Sen. Kerry Opposes Upcoming Missile Defense Deployment.” Aerospace Daily, 21 January 2004.
Selinger, Marc. “Third Site For GMD Interceptors Could Be Picked In A Year.” Aerospace Daily & Defense Report, 28 April 2004.

GMD Booster Test Successful

August 16, 2003 :: The Missile Defense Agency :: News

Saturday’s test of a booster for the ground-based missile defense system was successful. The test launch, which took place from Vandenburg Air Force Base, did not involve an intercept attempt, but was only for the booster itself. More tests are planned for this fall.
        The GMD system will be based in Fort Greely, with 16 planned interceptors. These are the interceptors which would carry the EKV, which employs “hit-to-kill” technology. There are also plans for another four interceptors based in California, at Vandenburg. This is part of the limited system the Bush administration has said will be deployed by late 2004. The system is limited, in that while it would defend against a few missiles launched from far away, such as from North Korea, it could not defend from either a large number of missiles such as would be launched from Russia or Communist China, or any number of short-range missiles launched from close by, such as from a ship off our coast. The GMD system nevertheless provides an important foundation for a more robust and layered system which would include defenses based on land, sea, and in space. (Article, Link) 

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Karako on Administration’s Deployment Decision

December 18, 2002 :: The Claremont Institute :: Analysis

Tom Karako of the Claremont Institute on the Bush administration’s decision to deploy the GMD by 2004-2005. Despite the system’s limitations, this marks a great step forward. (Article, Link) 

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Successful GMD Test

March 15, 2002 :: Department of Defense :: News

The Missile Defense Agency reports the fourth successful test of the Ground-based Midcourse Defense (GMD) Segment, in the most complex missile defense test to date. At 9:11pm Saturday, a modified Minuteman ICBM was launched from Vandenburg Air Force Base in California, fired out into the Pacific. Twenty minutes later, a prototype interceptor was launched from the Ronald Reagan missile site on the Marshall Islands, some 4,800 miles away. The interceptor destroyed the missile in midcourse at 9:40, over 140 miles above the earth.
        Like the sea-based test of January 25, this test also used an exoatmospheric kill vehicle (EKV), destroying the target warhead by impact alone. In this test, the interceptor distinguished the target from three decoy balloons. (A previous test had involved only one decoy.) The test also demonstrated the complete integration of space- and ground-based sensors and radars, including a prototype of the X-band radar. (Article, Link) 

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