Question

what is colimation error​

Answer 1

Collimation error is the largest potential source of systematic error for area leveling with unbalanced sight lengths, even with geodetic-quality levels. The Leica NA3003 User Manual states the “the standard deviation of a collimation error determined once only under normal atmospheric conditions is about 2 seconds.”

Answer 2

Collimation error is the largest potential source of systematic error for area leveling with unbalanced sight lengths, even with geodetic-quality levels.