A satellite system operates similar to a microwave system, but uses radio waves instead of microwaves. The system operates by sending a signal from the ground to a satellite which rebroadcasts it to another station on the ground. The disadvantage is that sometimes the satellite can be out of position, called satellite drift, which makes transmission difficult. The satellites stay in geosynchronous orbit, which means that they stay over the same part of the earth all the time. Light pulse media is where the signal is transmitted by converting it into pulses of light, sending it through a medium, and then converting it back.
Light pulses are a binary method of transfer.
The light pulses represent ON or OFF, or 1 and 0. Fibre optics is a light pulse medium. Fibre optics is a very quick, very high bandwidth transmission method. Data are sent through the medium through conversion into binary form, and then into light pulses. The advantage of this is that coming from a computer, the data only have to be converted into light, since the data are already in binary form.