The radar station's primary feature is an enormous satellite dish for connecting to the network of satellites orbiting the Earth. It is also useful for better coordination between unit, provide guidance for aircraft, and grants secure access to classified information (namely, access to advanced units and structures).
Some radar stations act as early warning systems, like the Nod radar array complex, which calls in additional Nod forces when Tratos' rescue mission was underway should it be left intact. GDI stations are also notable for having its own copy of EVA for better decentralization of command.
|The following is based on the Nod campaign for Tiberian Sun and some details might contradict canon.|
After the Second Tiberium War, satellite uplinks were miniaturized and installed directly into Construction yards.
The GDI Radar was originally supposed to have two upgrade slots and the name Communications tower. However, the idea was forwarded to the independent Upgrade center, but the residual SHP sprite still exists in Tiberian Sun and Command & Conquer: Red Alert 2 files.