Triangulated Height Accuracy Analysis Based on Double-Targets Located on Vertical Line on High Slope

Seeing from monitoring data used for high slope settlement,it is known that the height error caused by atmospheric refraction could be effectively eliminated or decreased when the difference is carried out in the wake of the method of triangulated height surveying based on double-targets which are located on the same vertical line.Comparing to one-way observation without dynamic correction(just choose the 0.14 experience refraction coefficient as atmospheric refraction correction) in the same condition,the observation precision is raised obviously.Only with simple surveying equipment to acquire more accuracy height result,this method has the characteristic of prosperity of convenient surveying with safety and practicality.