Question

The slope distance between two mountain peaks determined by an EDM measurement is 23,464.50m. The vertical angle at the lower of the two peaks to the upper peak is +3°02'05". The reciprocal vertical angle at the upper peak is −3°12'55". The height of the instrument and the height of the target at the ends of the line are assumed to be equal. Compute the difference in elevation between the two peaks first by using only the single vertical angles and applying correction for curvature and refraction, and second by using the average obtained by both vertical angles.

Answer 1