长距离高精度跨海高程传递觇板设计及应用

Design and application of sighting targets for long distance and high precision crossing sea elevation transmission

在长距离高精度跨海高程传递中,设计了一种便携式远距离照准觇板,结构简单、尺寸小、重量轻,现场安装和拆卸方便快捷,防风性能好,便于携带。可根据实际路线长度和环境随时调整标志线宽度和光强,以保证成像边界清晰,满足不同路线长度下的夜晚观测要求。经工程实践验证,该觇板满足长距离高精度三角高程跨海高程传递测量的需要,测量结果可以达到二等水准测量的精度。

A kind of portable long-range sighting target is designed for long distance and high precision sea crossing elevation transmission with simplicity,small-size and light weight,which achieves fast and easy installation and disassembly on site,with good windproof performance and easy to carry.The width and light intensity of the marker line can be adjusted at any time according to the actual route length and environment to ensure clear imaging boundary and meet the requirements of night observation under different route length.It is verified by engineering practice that the sighting target meets the requirement of surveying with aiming of long distance and high precision triangular elevation transmission over sea level,and the surveying result can reach the precision of second-class river crossing level.