A Primer on Satellite Communications
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Title: A Primer on Satellite Communications

Essay Details:

Subject: Technology
Author: Kirk M
Date: July 7, 2016
Level: University
Grade: B
Length: 42 / 12452

Essay text:

The period of revolution is equal to the period of rotation of the earth with respect to the stars, or 23 hours 56 minutes 4.1 seconds, and thus by Kepler's third law the orbital radius is 42,164 km. Taking into account the radius of the earth, the height of a satellite above the equator is 35,786 km. Clarke observed that only three satellites would be required to provide communications over the inhabited earth. As a primary application of such a satellite system, Clarke proposed that satellites in geostationary orbit might provide direct broadcast television service similar to DBS systems like DirecTV -- a remarkable idea at a time when television was still in its infancy and it was not yet known whether radio signals could penetrate the ionosphere...

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