Feasibility study of high-precision trigonometric elevation replacing second-order level in tunnel penetration control survey

Zhang Hongfeng, W. Qin, L. Wang, V. Yepes
2020 E3S Web of Conferences  
Based on the principle of trigonometric elevation measurement and the law of error propagation, the trigonometric elevation formula is derived in this paper. The factors that cause the trigonometric measurement error are analyzed accurately. It is considered that the use of a high-precision total station for the trigonometric elevation measurement under opposite conditions can reach the second-order level measurement accuracy.
doi:10.1051/e3sconf/202016504022 fatcat:pawwux6z4zhtfntoad6lcc5o3m