i) Elevation angle: Elevation angle is the vertical angle formed between the direction of travel of electromagnetic wave radiated from an earth station antenna pointing directly towards a satellite and horizontal plane.

The smaller the elevation angle , the greater the distance a propagated wave must pass through earth’s atmosphere.

If the angle of elevation is too small, and the wave travels through earth’s atmosphere is too long, the wave degrades the transmission quality.

ii) Altitude: The vertical elevation of an object above a surface such as sea level or land of a satellite is called as Altitude.