二等跨海水准测量两种方案分析

Analysis of Two Programs of Second-Level Cross-Sea Leveling Measurement

通过对两段各约2.5km的二等跨海水准测量不同的布设观测方法分析比较,方案Ⅱ采用双棱镜同时对向观测、完全不量仪器高和觇标高等关键技术,提高了作业效率。

The paper analyzes and compares two programs of second - level cross - sealeveling measurement. The second program em- ploys biprism, reciprocal observation without measurement of the height of the instrument and sighting target to improve the efficiency.