Geostationary satellites- Space Update

What are geostationary satellites?

The geostationary satellite is an artificial satellite. The earth revolves at an altitude of 35786 km from the earth.

Geostationary satellites- Space Update

A geostationary satellite revolves in an orbit concentric and coplanar with the equatorial plane, so the plane of the orbit of a satellite is normal to the axis of rotation of Earth.

Revolves in the same direction the earth rotates ( West to East ). Its periods of revolution around the Earth is the same as that of the Earth about its axis.

Syncom 3 The first satellite was launched by the US on 19 August 1964. If you set three satellites in the geosynchronous orbit, then the whole earth will be covered. Its coverage area is 120 degrees.

Geostationary satellites- Space Update

Its latency is 1/2 second, meaning it is very high. It becomes useless at high latitude.

Due to the geostationary orbit being very far away, it takes a lot of energy to send the satellite to that place. It takes 5 hours to reach that orbit.

What is the difference between geostationary and geosynchronous satellites?

 Geostationary Satellites- 

Geostationary satellites- Space Update

  • Orbit is circular
  • The inclination to the equator is zero.
  • The angular velocity of the satellite is equal to the angular velocity of Earth.
  • The Period of revolution is equal to the period of rotation of Earth.
  • These satellites would appear stationary from the Earth.
  •  Geostationary satellites hight is 20000 to 36000 km
  • Telecommunication, navigation, weather forecast.
  • A minimum of three satellites is needed to cover the entire Earth.
Geosynchronous Satellites-

  • Orbit is not circular.
  • The inclination to the equator is not zero. 
  • The angular velocity of the satellite is equal to an angular velocity of Earth.
  •  The period of revolution is equal to the period of rotation of Earth.
  • It looks oscillating but not stationary.
  • 20000 to 36000 km away from the surface of Earth.
  • Telecommunication, navigation, weather forecast.
  •  More than three to cover Earth.

Geostationary satellite example :

Geostationary satellites- Space Update

 INTELSAT-15 (at 85 deg East), GSAT-10 (83 deg East), INSAT-4CR (at 48 deg East), INTELSAT-11 (at 43 deg West)

There are around 375 active satellites around the geostationary arc at some longitude or other. In many cases 3 to 4 satellites are collocated at the same longitude. 

Geostationary satellites- Space Update Geostationary satellites- Space Update Reviewed by RJ Space on May 04, 2020 Rating: 5

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