A satellite is to be placed in equatorial geostationary orbit around the earth for communication
a) calculate height of such a satellite
b) find out the minimum number of satellites that are needed to cover entire earth so that at least one satellites is visible from any point on the equator
A satellite is to be placed in equatorial geostationary orbit around the earth for communication
a) calculate height of such a satellite
b) find out the minimum number of satellites that are needed to cover entire earth so that at least one satellites is visible from any point on the equator

a) Mass of the earth is given as M=6\times 10^{24}kg

Radius of the earth is given as R=6.4 \times 10^{3}m

Time period is given as 24.36 \times 10^{2}s

G=6.67 \times 10^{-11}Nm^{2}kg^{-1}

Orbital radius will be R+h

Using orbital velocity, we can calculate h = 35,940 km

b) Three satellites are required to cover the entire globe and ensure that at least one is visible from any point along the equator.