In civil communication field, non-GEO communication systems (MEO or LEO) that provide the global coverage of the earth have become the important part of personal communication system.

• 在民用通信领域,以全球化个人通信为特征的非静止轨道卫星通信网络(中、低轨卫星)已成为未来个人通信系统的重要组成部分;