Question

Define. Geostationary satellite and polar satellite

Answer 1

Geostationary (or synchronous) satellite:

It is a satellite that revolves around the earth in its equatorial plane with the same angular speed and in the same direction as the earth earth rotates about its own axis. Since it appears stationary to an observer on the earth, it is called as synchronous satellite. When this type of a satellite is used for communication purposes, it is called as communication satellite (Telstar was the first.)

Polar satellite:

It is a satellite that revolves around the earth in its polar orbit (perpendicular to the equatorial plane). As the earth rotates about its axis, a polar satellite successively passes through different points on the earth’s surface, hence scanning the entire earth. Examples are: SPOT, IERS, etc..
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Answer 2

A geostationary satellite  is an earth-orbiting satellite , placed at an altitude of approximately 35,800 kilometers (22,300 miles) directly over the equator, that revolves in the same direction the earth rotates (west to east). ... Began, the new global mobile communications network, u u uses geostationary satellite
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