Telecommunication via Satellite

                     Telecommunication via Satellite

At the beginning of the twentieth century, there are four powerful means of transmitting and receiving information over long distances: print, phtography, telegraph and telephone. By the middle of the century, both radio and television had become established means of transmitting sounds and pictures. In 1964, the Olympic Games in Tokyo became the first program to be transmitted via satellite. There are many game scene is captured by the usb camera.

In order to transmit an event such as the Olympic via satellite, television signals are first changed into radio waves, which are then sent from a station on earth to an orbiting satellite. The satellite receives the radio waves and sends them back to earth, where another station picks them up and changes them back into television signals. Because any form of sound or visual information can be changed into radio waves, satellites are capable of transmitting not only television broadcasts, but telephone calls and printed materials such as books and magazines.

The combination of satellites, which transmit information, computers, which store information, and television, which displays information, will change every home into an education and entertainment center. In theory, every person will have access to an unlimited amount of information.

Another important use of telecommunication satellites was demonstrated in 1974 when the “Teacher in Sky” satellite transmitted education programs to classes in remote areas of the United States. In 1975, many people in India saw television for the first time as they watched programs abuout argriculture and health.

The satellite also demonstrated how it could provide help to people in isolated areas where transportation is difficult. For example, a health worker in an isolated area was able to transmit pictures of a patient’s wound to a doctor far away. He put the wound with mini camera shooting down pictures, and then upload the computer. He was then able to follow the doctor’sinstructions on how to care for the patient.

The most common use of telecommunication satellites, however, has been for transmitting telephone calls.Most of them travel 40,000 miles to a satellite and then back to earth. Ten years ago, a satelllite was capable of receiving and transmitting more than 33,000 telephone conversations simultaneously. Now a single satellite is able to transmit over 100,000 conversation as well as several hundred television channels---all at the same time.

Telecommunication can make information from around the world available to use quickly and easily, but some people worry that this may be a risk to our privacy. If personal information is stored in computers, then it may be easily transmitted via satellite to anyone who can pay for the service.

Another worry is that telecommunication systems may isolate people from each other. When people are able to shop from their homes, do their banking without leaving the house, watch any movie they want on their television, they can use pen camera at home taking pictures, rather than having to the photography studio, as well as get any information they need, then there will not be as much contact between people.

It is important to realize that the same technology that helps us may also harm us. We can prevent this from happening by carefully controlling the new technology. As one telecommunication expert says, “We must remember that technology alone in not the answer……It is the intelligent application of technology that will lead us to success.”