31
Error
Sources Associated With Differential Leveling
Error Source Typical Size of Error
in mm Per 1 km Section
›“Quasi” Random
Errors:
›Scintillation,
short-period …………………………………. 1.0
›Scintillation, long-period ……...………………………….. 5.0
›Pointing error (experienced observer)..…...……………….. 0.4
›Rod error in
individual graduations ..…………………….
0.1
***
NOTE: Assumes 50 meter sight lengths and 10 setups per 1
kilometer section.
