Other satellites are made by scientists and technologists to go around the earth and do certain jobs. Some satellites send and receive television signals. The signal is sent from a station on the earth's surface. The satellite receives the signal and rebroadcasts it to other places on the earth. With the right number of satellites in space, one television program can be seen all over the world.
Some satellites send and receive telephone, fax, and computer communications.
Satellites make it possible to communicate by telephone, fax, Internet, or computer with anyone in the world. Other satellites observe the world's weather, feeding weather information into giant computer programs that help scientists know what the weather will be. The weather reporters on your favorite TV news program get their information from those scientists. Still other satellites take very accurate pictures of the earth's surface, sending back images that tell scientists about changes that are going on around the world and about crops, water, and other resources. The Boeing 376 is used mostly for broadcast television and cable television.