Maharashtra BoardEnglish MediumSTD 11 SciencePhysicsGravitation4 Marks
Question
Write a short note on Polar satellites.
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Answer
Polar Satellites are placed in lower polar orbits.
They are at low altitude 500 km to 800 km.
Period of revolution of polar satellite is nearly 85 minutes, so it can orbit the Earth 16 time per day.
They go around the poles of the Earth in a north-south direction while the Earth rotates in an east-west direction about its own axis.
The polar satellites have cameras fixed on them. The camera can view small stipes of the Earth in one orbit. In entire day the whole Earth can be viewed strip by strip.
Polar region and equatorial regions close to it can be viewed by these satellites.
Polar satellites are used for weather forecasting and meteorological purpose. They are also used for astronomical observations and study of Solar radiations.
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