High Endoatmospheric Defense Interceptor (HEDI)

The High Endoatmospheric Defense Interceptor (HEDI) was a theoretical terminal phase anti-ballistic missile system, which was designed to demonstrate the principle of hypersonic target acquisition and tracking in the atmosphere, originally funded under the Strategic Defense Initiative Organization for the United States. As proposed, HEDI was a system of ground-based interceptors at one site coupled with a space-based sensor system. HEDI was intended to intercept incoming ICBMs...