According to the demand of the absolute measurement by the Low-latitude meridian circle for problems of the measurement of the zenith distance in the direction of the prime vertical using the slant silts the previous grating form is improved based on the former micrometer scheme .

根据低纬子午环绝对测定的要求，在原来的测微器方案〔1〕的基础上，针对斜狭缝用于卯酉方向测定 天顶 距时所存在的问题，对原来的视栅形式作了进一步改进。

All the time that he gazed upward to the zenith he was nevertheless perfectly aware that little Pearl was pointing her finger towards old Roger Chillingworth who stood at no great distance from the scaffold .

在仰望 天顶的整个过程中，他始终非常清楚，小珠儿在指着站得离刑台不 远的老罗杰齐灵渥斯。

The method for calculating horizontal distance using zenith distance corrected by earth curvature and atmospheric refraction in article 1 w_752 is proved rightly and some suggestions to perfect article 1 w_765 are also given .

证明了文献1w_773提出的用经球气差改正的 天顶 距计算平距方法的正确性，并就文献1w_796的改进与完善提出了有益的建议。

THE COMPUTATION OF THE ZENITH DISTANCE AND SLOPE DISTANCE IN TRIGONOMETRICAL LEVELING Reduction to Mark Center of Slope Distance and Vertical Angle on Vertical Plane

三角高程测量中 天顶和斜 距的计算斜距垂直角在竖直面上的归心改正

The effects of the atmospheric refraction index structure constant zenith angle focal distance beam topological charge turbulence outer scale etc. on the intensity distribution and spatial coherence on the receiver were studied for above-mentioned different types of beams with detail .

分析了大气折射率结构常数、 天顶角、 焦距、光束拓扑荷和湍流外尺度等因素对上述不同特性激光束接收面光强分布和空间相干性的影响。

The results show that the effect of the higher power terms of the directional error of the instrument is comparatively great within the observable range of the zenith distance and the correction for the results must be made .

研究结果表明，仪器定向误差的高次项影响在可观测 天顶 距范围内都是比较大的，必须在结果中加以改正。

The paper expounds the principle and the method of measuring zenith distance for celestial positioning based on the direction of gravitational force line .

论述了在海上进行天文定位时以重力线作 基准 直接测定天体 顶 距的原理和方法。

Equations for strains and tilts obtained from changes in line length and zenith distance are given .

文中给出了三维测量中边长与 天顶 距变化同应变与倾斜的关系式。

On the variances of the star images tremble versus different zenith distance

星像抖动随不同 天顶 距的变化

Automatical setting of zenith distance

自动放置 天顶 距

The temperature characteristic for the zenith distance correction of the DANJON astrolabe & the discussion of a method for studying the characteristic curve

OPL棱镜等高仪 天顶 距改正的温度特性的研究&特性曲线研究方法的讨论

The effect of the eccentric error of vertical circle on zenith distance observations and its correction

竖直度盘偏心误差对 天顶 距观测结果的影响及其改正

Analysis on Radar Apparent Distance by Different Elevation Altitude THE COMPUTATION OF THE ZENITH DISTANCE AND SLOPE DISTANCE IN TRIGONOMETRICAL LEVELING

不同海拔高度时雷达 视距分析三角高程测量中 天顶和斜距的计算