**λ** : Elevation angle ("lamda") in radians - multiply by 57.1^{o}to convert to degrees.

d : distance between object and observer

z_{1} : distance to the observer's horizon

z_{2} : distance to the observer's horizon

R : Radius of Earth = 3960 mi or 6378 km

Elevation Angle Formula.

Complete derivation in pdf format:Solution

The elevation angle of a distant peak can be determined from the following **Elevation Angle ("lambda) Formula:**

h_{1} : observer's height above sea level

h_{2} : object's height above sea level

From the above equations the
observer and object horizons can be determined and then plugged into the **Elevation Angle Formula**.