摘要
本文讨论了欧、日、美、亚、俄等直播卫星业务的发展状况，给出了各系统的卫星参数。直播卫星业务的发展方向是数字化。
This paper discusses the latest developments of live satellite services in Europe , Japan , America and Russia, presents the satellite parmeters of various systems , and points out that the tendency of live satellite services is towards digitalization.
出处
《数字通信》
1997年第1期36-39,共4页
Digital Communications and Networks
