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1·There is a close correlation between sea level slope and height datum, in which geodesylists and oceanographers are interested.

海面倾斜与高程基准密切相关，它已经受到大地测量学界和海洋学界的重视。

2·The reason why GPS leveling cant be used for height transfer across obstacle is that the height datum of both sides of obstacle is not consistent.

GPS水准无法直接应用于跨障碍高程传递，其关键原因在于障碍物两侧的高程基准不一致。

3·The higher requirement of the former coordinate datum, height datum and gravity datum was in dire need of improvement and update in modernization.

提出了国家地理空间信息基准框架内改进与更新原有的大地坐标基准、高程基准和重力基准的建设道路及解决原则。

4·The key of GPS leveling across sea is that the height datum on each side of channel is not consistent, so the general geometrical fitting method can not be used directly.

GPS跨海水准的关键问题是海峡两侧的高程基准不一致，因此无法采用常规的数值拟合方法。

5·Some key techniques, such as attitude correction, quality control of GPS height, transformation of vertical reference datum and extraction of tidal level, are studied in detail.

这些关键问题主要有姿态改正、GPS高程质量控制、垂直基准转换、基于信号的在航潮位提取。

6·In this paper, the observed land surface height data and tidal data in the Yellow River delta foreland area are used to describe the variations in depth datum and tidal level in the area.

通过黄河三角洲前沿陆地高程的变化和验潮获得的资料，介绍了黄河三角洲前沿深度基准面的变化和潮位变化情况。

7·The datum line and mainly three profile height parameters of surface roughness are briefly introduced and the operation principle and system structure of AFM.

简要介绍了评定表面粗糙度参数的基准线及其主要的两个轮廓高度评定参数，详细阐述了重庆大学研制成功的一种高精度原子力显微镜——AFM。