a3= 3 / n2
Where, n = Mean motion of the satellite in rad/sec.
3 = Earth’s geocentric gravitational constant.
With the n in radians per sec. the orbital period in second is given by,P = 27 / n
5. Define Inclination.
The angle between the orbital plane and the earth’s equatorial plane. It is measured at the
ascending node from the equator to the orbit going from east to north.
6. Define mean anomaly and true anomaly.
Mean anomaly gives an average bvalue of the angular position of the satellite with
reference to the perigee. True anomaly is the angle from perigee to the satellite position,
measured at the earth’s center
7. Mention the apogee and perigee height.
r a = a(1+e)
r p = a(1+e)
8. What is meant by azimuth angle?
It is defined as the angle produced by intersection of local horizontal plane and the plane
passing through the earth station, the satellite and center of earth.
9. Give the 3 different types of applications with respect to satellite systems.
• The largest international system (Intelsat)
• The domestic satellite system (Dom sat) in U.S.
• U.S. National oceanographic and atmospheric administrations (NOAA)
10. Mention the 3 regions to allocate the frequency for satellite services.
• Region1: It covers Europe, Africa and Mangolia