3 |
Satellite TV |
| CHAPTER |
FIGURE
3.1
Satellite TV is based on space technology.
Since the dawn of man, the horizon has been the limit of visual observation. At the end of the nineteenth century, humans started to get interested in radio waves, and quite soon it became evident that the horizon was still an obstacle for the propagation of this new means of communication.
In the early days of radio, only low frequency and long wavelength signals were used. These signals are reflected into the atmosphere and can reach beyond the horizon. That's why it is possible to receive radio from distant stations in the long-, medium-and shortwave frequency ...
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