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未来战略性空中威胁包括,采用空气喷气推进装置的战略空地导弹和飞机;从固定或机动式发射装置上发射的各种射程的弹道导弹;攻击卫星和宇宙飞船等天基系统的各种武器。因此,战略防御应是三层的,即防空、空间防御与弹道导弹防御“三合一”,才能抗击上述威胁,实现积极防御,保卫国家安全、生存与发展。为此,美国国防部进行了综合性研究,称为“2000年战略防御体系倡议”(SDA2000),提出建立“三合一”的战略防御体系(SDT)。该体系包括:各种武器、飞机、宇宙飞船、
Future strategic air threats include strategic air-to-surface missiles and aircraft using air-jet propulsion; various-range ballistic missiles fired from fixed or mobile launchers; and weapons attacking space-based systems such as satellites and spacecraft. Therefore, the strategic defense should be three-tier, that is, the three-in-one of air defense, space defense and ballistic missile defense can we fight these threats and achieve active defense to safeguard national security, survival and development. To this end, the United States Department of Defense conducted a comprehensive study called the “2000 Strategic Defense System Initiative” (SDA2000) and proposed the establishment of a “three in one” strategic defense system (SDT). The system includes: a variety of weapons, aircraft, spacecraft,