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# '''Ground-Station:''' It receives the satellite signal and transmits the control signals to the satellite. On ground, the biggest advantage is liberty and flexibility since there are no rigid size or area constraints. The objective is to reliably receive from and transmit to satellite irrespective of satellite’s current state or weather. The variety in Ground-station setups can be seen from the fact that International Space Station (ISS) reception does not require specialised antennae, whereas deep space missions require GMRT that can go upto the size of football fields. The huge difference in the two above setups is that one receives signals from more than 10000 km away and the other receives it from just 400 km. The tasks of the ground-station team are:
:* '''Pre-launch:'''
:** Set-up an all weather station that can receive satellite signals for a whole pass. <ref> Pass: A satellite rises from horizon to a particular elevation and then goes back down. This whole duration from one horizon to another is known as a pass. It is easier to receive it at higher elevation than at horizon. This is because satellites can only be traced in line of sight.
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:** Test your setup in all ways possible, using existing satellites and creating dummy signals