The angular velocity of the satellite is same in magnitude and direction as that of angular velocity of the earth about its own axis .
These satellites are used in communication purpose . INSAT 2B and INSAT 2C are geostationary satellites of India .
2 . Polar Satellites
These are those satellites which revolve in polar orbits around earth . A polar orbit is that orbit whose angle of inclination with equatorial plane of earth is 90 °.
Height from earth ’ s surface = 880 km
Time period = 84 min Orbital velocity = 8 km / s
Angular velocity = 2π / 84 = π / 42 rad / min .
There satellites revolve around the earth in polar orbits .
These satellites are used in forecasting weather , studying the upper region of the atmosphere , in mapping , etc .