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ced to digital voice. These voice channels can also support low-speed data exchange. Of course, just a cell phone is not enough, there is a key equipment is base stations and switches. Can naturally control their own geographical construction of a ground station and set the switches will not be able to establish a ground station in the combat zone and behind enemy lines. It depends on communications satellites and Synchronous communication satellite of course is a good platform for the broadcast, but costly to transmit power to the ground equipment requires a great deal, had to use dish. Americans put into commercial operation in the end of the twentieth century, the Iridium system is relying on 66 runs in the near-Earth low orbit satellite global wireless handheld telephone communications. Both satellite transceiver base stations, between exchange can be achieved on the Star. China used to rent some of the phone as a civilian, also built on the ground of the Iridium system access station country. Our military attaches great importance to this idea, but it is impossible to take advantage of the military. After the invention of the battery Jinlong,new nfl jersey, communications Hyobu developed military-type low-orbit communications satellite system, its scope is limited to between 50 degrees latitude north and south,green bay packers jersey women, can increase the power of the phone because of the the Jinlong battery support, so the satellite orbit than the Iridium slightly higher. 26 satellite can guarantee 24 hours of ground users can take advantage of, s