Category: Communications

A photon doesn’t know it, but humans have decided to call it a bunch of different things. One of the ways we label it is by saying that a photon’s energy level happens to fall within a “Band”.

This should be simple but different satellites use transponders for different reasons.

Communications is between anything and everything: the spacecraft and the ground, the spacecraft and other spacecraft, and ground stations to operation centers. Even simple satellites can have multiple communication paths to think about.