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SBS(卫星商业通信系统),是美国的又一个国内卫星通信系统。由美国通用通信卫星公司、IBM公司和艾蒂纳(Aetna)人寿保险公司联合经营。将于1980年下半年用航天飞机射入同步轨道。SBS卫星系统将为商业界、政府部门和其它通信用户提供专用、切换和高数据速率的通信。该系统的特点是:地面站很小,可安装在用户屋前或办公室里,用全数字传输;可进行声音、数据、传真和电视等的综
SBS (Satellite Commercial Communication System) is another U.S. satellite communications system. Jointly operated by General Communications Satellite, IBM and Aetna Life Insurance. Shuttle will be launched into geosynchronous orbit in the second half of 1980. The SBS satellite system will provide private, switched and high data rate communications for the business community, government agencies and other communications users. The system is characterized by: ground station is very small, can be installed in the user’s house or office, with all-digital transmission; can be voice, data, fax and television and other comprehensive