Answer the following problems

problem 1) Downlink frequency is kept different from uplink frequency, describe why?

problem 2) How many communication satellites are required in minimum to cover the whole of the earth? Why?

problem 3) To serve the area on the earth by satellite communication, what is the essential condition?

problem 4) Where do we prefer satellite communication? prepare down one disadvantage in comparison to terrestrial link.

problem 6) What do you mean by noise figure. How is it relevant to satellite communication?

problem 5) What do you mean by EIRP?

problem 6) Why do we express satellite communication performance in terms of Carrier to Noise ratio instead of Signal to Noise ratio?

problem 7) What are on board mechanism available to stabilize and position the satellites, normally?

problem 8) How can you classify linear polarization modes?

problem 9) Differentiate between TDM and TDMA.