Then the zenith distance and slope distance can be worked out even if the effects of erect refraction of atmosphere does exist, thus extending the adaptability of zenith distance and enhancing its accuracy in trigonometrical leveling.
本文通过分析大气密度与大气垂直折光系数的关系 ,推导出消除了大气垂直折光影响的天顶距和斜距计算公式 ,既拓宽了天顶距的适用范围 ,又提高了三角高程测量成果精度。
The demands on accuracy of measured apparent zenith distances and the necessity of elimination of systematic errors during the time of determining the astronomical refraction and building the radio wave refractive delay corrective model are described concisely.
简述了测定瞬时大气折射值以及建立电磁波折射延迟改正模型时,对视天顶距测定值的精度要求和消除系统误差的必要性;根据新的仪器误差理论,文章采取与国外高精度测量仪器的误差测量方法相对比的方式,介绍了专用测量仪器的各种主要误差的测定方法及其所能达到的精度;还介绍了在不同方位的观测时,视频CCD图像中星像的分布情况。
The Samrat Yantra: a89 foot high and148 foot wide sundial.
三角形结构的巨型日晷，用于计算当地时间，天顶距等。
Enter the measurement from the top of the landing to the bottom of the ceiling above the landing.
输入平台顶部到其上方天花板底部的距离。
The location of the two stars in the sky is described as of70 o above the horizontal in the east.
该双星在天空中的位置为正东方向，距天顶约20度。
relating to or located at or near the zenith.
关于天顶的，位于天顶的，或靠近天顶的。
HubBle distance
哈勃距离(天文学)
This distance corresponds to the space between the dimple in the chin and the hair-line.
这个距离与下巴酒窝与发髻顶端的间距相同。
They do not hold half the sky, but the whole sky.
不是顶半边天而是顶整个天。
the perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel).
从几何基准面到顶端的垂直距离。
The construction quality control of long distance and large bore steel pipe driving
长距离大口径钢管顶管施工质量控制
Distance--Interpretation on the Structuralism in A Woman on a Roof
距离——《屋顶丽人》的结构主义解读
Application of Large Diameter & Long Distance Curve Pipe Jacking Technology
大口径长距离急曲线顶管技术的应用
altitude intercept
高度差截距天文位置线)截距
He even shot the hose upward and washed the tree tops and the roof of the house.
他甚至还把水管朝天，去冲树顶和屋顶。
A domed roof or ceiling.
穹顶一种半球形的屋顶或天花板
light-time for astronomical unit distance
天文单位距离的光行时
a spacecraft's orbital distance from the earth
航天器的远地轨道距离
DME ground beacon antenna
测距装置地面信标天线
--the astronomical distances which separate us.
分隔我们的天文距离。