根据卫星通信的特点和优势,可以预测21世纪的卫星通信技术发展会集中在以下几方面: (一)新的卫星轨道 1.极轨道卫星群,如包含有星际链路相互连接的“铱”卫星系统; 2.大椭圆轨道卫星群,如苏联“闪电”型那样的卫星系统,用于卫星移动通信业务; According to the characteristics and advantages of satellite communications, it can be predicted that the development of satellite communications technologies in the 21st century will focus on the following aspects: (1) New satellite orbits 1. Polar orbit satellite clusters, such as “iridium” containing interplanetary links, Satellite systems; 2. Large elliptical orbit satellite constellations, such as the Soviet “Lightning” -type satellite systems used for satellite mobile communications services;