Bearing Angles (Ellipsoidal ERM)
• From the previous slide there are three possible definitions for
defining the bearing angle: ß1, ß2 and ß3.
• The angle ß2 is preferred because of its unique definition but it is computationally complex to compute.
• For distances under a hundred kilometers all three angles are nearly the same.
• The normal section from A to B is generally used for bearing computations in practice.
• Note that A and B are on the surface of the ERM.