A geostationary satellite appears stationary to an observer on the earth. A satellite becomes geostationary if the following two conditions are satisfied.
(i) Its orbit is circular and coplanar with the equatorial plane of the earth.
(ii) Its angular velocity is same as that of earth, in magnitude and direction. (So their period revolution around the earth is 24 hours).
The height of geostationary satellite from the surface of earth is:
On substituting the values of g = 9.8 ms-2, R = 6.4 x 106 m and T = 24 x 60 x 60 second, we get
h = 36000 km.
and v0 = 3.1 kms-1
