COMMUNICATION
To communicate between the Earth and Rosetta, there are antennas but there are no direct connection between Philae and the scientist. Rosetta is the intermediary between Philae's information and the scientists. The waves which are send by the scientists are the same used in others projects.
Each Monday and Thursday engineers give to Rosetta and Philae their instructions. This step takes 24 hours and give to Rosetta and Philae their orders for 3 days.
