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最近批准的欧洲数据中继卫星初步计划,是建立欧洲数据中继卫星系统的第一步,该系统计划90年代后期投入使用。系统由两颗卫星组成,可同时覆盖85～100％的用户卫星轨道。
The recently approved initial plan for the European data relay satellite is the first step toward establishing a European data relay satellite system which is scheduled to be operational in the late 1990s. The system consists of two satellites, which can simultaneously cover 85-100% of the user’s satellite orbits.