随着空间科学技术的发展,在通信卫星的基础上,进一步研制出试验与实用的广播电视卫星,它利用功率较大的星载转发器,直接对它服务区内的广大用户,传送电视节目。由于卫星直播电视具有复盖面大;使用的转发频率高,传输容量大,能同时传送多路彩色电视节 With the development of space science and technology, on the basis of communication satellites, we have further developed experimental and practical radio and television satellites that utilize the more powerful spaceborne transponders to directly transmit the television programs to the large number of users in its service area . As the satellite live television has a large coverage; the use of the high frequency of transmission, transmission capacity, can send multiple color TV festival