communications satellite
6.A transmitting or receiving aerial shaped as a dish; used to receive signals from a communications satellite.
7.Nowadays,communications lf submarines have many ways,such as VIJFradio communications,ELF radio communications,HF/UHF/VHF radio communications,UHF/SHf/EHF satellite communications even blue,green laser communications.
9.In satellite communications, the point at which the satellite is at a minimum distance from earth in its orbit.
10.Distributed database (DDB) system is becoming one of the most active IT fields with the quick development of computer network and communications technology and wide employment of satellite communications, cellular communications, LAN, WAN, Internet and Intranet.
