Bearing Angles (Ellipsoid of Revolution ORS)
• 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 ORS