精密水准测量一般指国家二等或二等以上的水准测量。是国家高程控制的全面基础,可为研究地壳形变等提供数据。精密水准测量必须用带测微器的精密水准仪和膨胀系数小的因瓦水准标尺,以提高读数精度、削弱温度变化对测量结果的影响。仪器至标尺的距离约在35~60米,且距前后标尺的距离基本相等,同时采用完善的观测程序,以削减水准仪残余的微小倾斜带来的影响和大气折光影响。
本文采用GPS技术及常规的方向、距离和精密水准测量对三个站进行了空间归心测量。
To determine the relative positions of them, the GPS technique, traditional direction and range survey, and precise leveling are adopted in this paper.
本文研究提出了在前后视距不相等的情况下进行精密水准测量的方法,分析了具体的实测方案。
A method of precise levelling under unequal back-and fore-sight length is studied and presented in this paper.
应用精密水准测量方法,于1993年在温泉区取得三十周期的观测成果,结合以往资料进行综合分析,得出初步结论。
The paper provides the surveying results 3 periods with high-precision levelling in Hot Spring Area in 1993. A preliminary conclusion was achieved by analysing former materials.
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