The concept seeks to exploit the three-to-five-minute boost phase, when a missile is still powered by its main engines and produces a strong infrared signature. At that stage, it has not yet released re-entry vehicles, debris or potential decoys that make interception more difficult later in flight.
“The idea is to engage with the threat early in flight before the threat complexity increases in midcourse,” said Todd Stevens, Lockheed Martin vice president of Strike, Deterrence and Missile Defense. Lockheed Martin describes the boost phase as the earliest interception opportunity in a layered defensive architecture.
Under the company’s concept, space-based infrared sensors would first detect and verify the launch signature. An orbiting platform would then release an interceptor, using rocket propulsion and onboard micro-thrusters to adjust its trajectory toward a high-speed collision.
“That moment is the simplest for the offense and the clearest shot for the defense,” Stevens said. “Once the missile deploys its payload in space, multiple objects, including re-entry vehicles, booster debris and possibly decoys, travel along the same trajectory dramatically complicating the interception challenge.”
If the missile survives the boost phase, the engagement would move into midcourse, where long-range ground-based interceptors could target the threat in space. Terminal systems would provide a final interception opportunity against a surviving re-entry vehicle during its descent towards the target area.
Lockheed Martin argues that an early intercept could also change the economics of missile defence. A successful boost-phase engagement could destroy a missile before it releases multiple ballistic, hypersonic or manoeuvrable re-entry vehicles that might otherwise require several interceptors later in flight.
The company plans upcoming testing to demonstrate the viability of a boost-phase interceptor. The work is intended to determine how another engagement layer could be integrated into a broader defence and deterrence architecture protecting the U.S. homeland and allies.
“Lockheed Martin brings decades of experience delivering legacy defense and deterrence systems, from strategic missile defense architectures to space-based sensor networks,” Stevens said. “That heritage gives us the technical depth and integration expertise needed to make integrated air and missile defense possible.”
Lockheed Martin said the broader objective is to create several opportunities to engage a missile during its flight rather than depend on a single defensive layer. The proposed space-based interceptor would extend that sequence towards the beginning of the missile’s trajectory, before the threat becomes more complex in midcourse.
