GPS水准高差拟合应用于跨河水准测量研究

Study of Normal Height Difference Fitting Method of GPS River-crossing Leveling

常规跨河水准测量均要求具有良好的通视条件,其场地选择困难,观测操作复杂,目标照准困难,大气垂直折光影响严重,气象因素干扰大,工期长、效率低,适用的跨河距离有限,因此,在现有技术条件下,寻求一种精度优良、效率更高、不受环境影响而又易于推广的跨河水准测量方法,以取代传统高程传递手段势在必行。对GPS应用于跨河水准测量、各种GPS高差拟合模型进行了讨论。

The general rivercrossing leveling methods usually require better inter- visibility condition. It is difficult to choose proper site and the observing operation is very complicated. With the great influence of the atmospheric vertical refraction and the meteorological factor interference, it is difficult to find the observed goal, which brings about time - consuming work, low efficiency and limited suitable river - crossing. So under the existing technological condition, it is very pressing and necessary to seek a new river - crossing leveling method to replace the traditional one.