IAS Mantra Series : Satellite communication-05


Q4. What is the effect of solar eclipse of a satellite?
Ans.: When the satellite is in the shadow of the earth, the earth prevents sunlight from reaching the satellite and the satellite is said to be in eclipse. Since a satellite generates electrical energy for its house-keeping from solar radiation, the solar eclipse affects the operation of a satellite to a large extent.
During the equinox period around the March 21 and September 23, the geostationary satellites come within the shadow of the earth on the far side of the earth from the sun. About 21 days are required from the first day of the eclipse to reach the equinox. The length of the eclipse period varies from a few minutes to over an hour. The duration of the eclipse depends on how close the plane of the geostationary orbit is with respect to the centre of the shadow thrown by the earth.
A satellite does not receive any power from its solar array during full eclipse. The satellite operates entirely from its batteries during this period. As solar eclipse is a kind of sudden stress condition for the satellite. The chances of equipment failure are quite high during eclipse. 

To Read More about Satellite communication click on the following link :Satellite Communication

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