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...Overview basics of satellites types capacity allocation how do work two stations on earth want to communicate through radio broadcast but are too far away use conventional means the can a satellite as relay station for their communication one sends transmission this is called uplink transponder converts signal and it down second downlink advantages over terrestrial coverage area greatly exceeds that system cost independent distance from center very precise higher bandwidths available disadvantages launching into orbit costly bandwidth gradually becoming used up there larger propagation delay in than factors elevation angle horizontal surface line beam effects ideally you degrees so reaches horizon visible all directions however because environmental like objects blocking atmospheric attenuation electrical background noise minimum...