在高层及超高层建筑工程中，测量基准传递和轴线、垂直度、高程控制是建筑物施工质量控制的重点内容之一。
The transforming of survey datum and the control of axis, vertical level, elevation are of great importance on controlling quality of high-rise building construction.
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。
There is a close correlation between sea level slope and height datum, in which geodesylists and oceanographers are interested.
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。
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.
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。
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.
仿真结果表明用户和基准台之间距离增大和低卫星仰角都将使伪距残差增大，气象因素和高程对伪距残差也有影响。
The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satellite elevation.
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。
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.
阐述了1985国家高程基准研究工作和成果。
Research on the 1985 National Elevation Datum and the results obtained are highlighted.
北京水准原点是我国高程控制网中的一个重要基准点。
The Beijing Fundamental Bench Mark (BFBM) is an important reference datum in the elevation control network in China.
首先介绍了高程基准的定义与现状，指出了用验潮站长期平均海平面建立局部高程基准所存在的问题；
First, the defmation and status of height datums is introduced and some problems on the local height datums established by the mean sea level, which is defined by the tide gauge data, are discussed.
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。
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.
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。
The higher requirement of the former coordinate datum, height datum and gravity datum was in dire need of improvement and update in modernization.
RG线作为时深转换基准面的前提是RG线等效于地表高程的平滑线。
The precondition of RG line being as datum of time-depth conversion is that the RG line is equivalent to the smooth line of surface elevation.
实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。
Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.
在我们做大量的结构分析工作之后我们才能让承包商去建造正确的拱。这样他们全都会去做零高程基准工作了。
It took a great deal of structural analysis work on our part so that we would be able to tell the contractor to build the right cambers so they would all go to the zero baseline elevation.
在我们做大量的结构分析工作之后我们才能让承包商去建造正确的拱。这样他们全都会去做零高程基准工作了。
It took a great deal of structural analysis work on our part so that we would be able to tell the contractor to build the right cambers so they would all go to the zero baseline elevation.
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