Geostationary and Polar Satellites

Polar orbiting satellites constantly circle the Earth in an almost _____, passing close to both poles. 

Why are polar orbits used for weather?
 

What is the advantage of polar orbit compared to a geostationary orbit?
 

What are the advantages of polar orbiting satellites?
 

How do communication satellites work?
 

Satellites communicate by using radio waves to send signals to the antennas on the Earth. 

There are two different types of satellites _____?

What are the four applications of satellite?
 

What are the uses of polar satellite ?

What is communication satellite and its application?

What is the lowest satellite height?

Weather satellites are used to forecast weather, temperature, humidity corresponding to a region.

What are the usage communication satellites.

Write a short note on Weather satellites.

What are the different types of artificial satellites on the basis of their application?

What are low height satellites?

Why are polar satellites used in remote sensing?

A geostationary satellite:

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly $36,000 \mathrm{km}$ from the surface of the earth. Potential due to earth’s gravity at the site of this satellite is $-9.4\times {10}^n {\mathrm{Jkg}}^{-1}$. Find $n$ (Take the potential energy at infinity to be zero). Mass of the earth$=6.0\times {10}^{24} \mathrm{kg},$ radius$=6400 \mathrm{km}$. 

Calculate the height of the communication satellite. $(\mathrm{Given}: G = 6.67\times {10}^{-11} {\mathrm{Nm}}^2/{\mathrm{Kg}}^2 , M = 6\times {10}^{24} \mathrm{kg}, R = 6400 \mathrm{km})$