Question

discuss geostationary satellite

Answer 1

A single geostationary satellite is on a line of sight with about 40 percent of the earth's surface. Three such satellites, each separated by 120 degrees of longitude, can provide coverage of the entire planet, with the exception of small circular regions centered at the north and south geographic poles. A geostationary satellite can be accessed using a directional antenna, usually a small dish, aimed at the spot in the sky where the satellite appears to hover. The principal advantage of this type of satellite is the fact that an earthbound directional antenna can be aimed and then left in position without further adjustment. Another advantage is the fact that because highly directional antennas can be used, interference from surface-based sources, and from other satellites, is minimized.

Geostationary satellites have two major limitations. First, because the orbital zone is an extremely narrow ring in the plane of the equator, the number of satellites that can be maintained in geostationary orbits without mutual conflict (or even collision) is limited. Second, the distance that an electromagnetic (EM) signal must travel to and from a geostationary satellite is a minimum of 71,600 kilometers or 44,600 miles. Thus, a latencyof at least 240 milliseconds is introduced when an EM signal, traveling at 300,000 kilometers per second (186,000 miles per second), makes a round trip from the surface to the satellite and back.

Answer 2

geostationary satellite geo:-earth ,stationary:-rest.these setellite are also knows as geosynchronous setellite those satellite which are seems to be rest from the surface of earth. these setellite havr same angular velocity as earth have.obviously ,the speed of such setellite relative to earth is zero.that's why it appears to be stationary w.r t any point on the surface of earth .these settalite are used for communication purpose hence alse called communication setellite. these settalite are use to put eyes on particular space or to find the location of anything.