1.
The error in azimuth must be controlled by astronomical observations for azimuth(and longit ude).
方位误差必须观测天文方位角（及经度）来控制。
2.
THE SURVEY AND PRECISE ESTIMATION OF ASTRONOMICAL AZIMUTH AT CHANGCHUN GEOMAGNETIC STATION
长春地磁台天文方位角测量及精度估计
3.
Study on UAV Positioning Arithmetic Based on Celestial Navigation
基于天文导航的无人机定位方法研究
4.
light-time for astronomical unit distance
天文单位距离的光行时
5.
automated astronomic positioning device
自动化天文定位装置
6.
A Numerical Prediction Method of the Sea Level Under the Coupling Action Between Storm Surge and Astronomical Tide in the Northern Yellow Sea
北黄海天文潮与风暴潮耦合水位的数值预报方法
7.
The Study on Test Method on Using Borderline Water Level to Direct Outflow Used by Shuntian Hydrologic Station;
顺天水文站利用顶托临界水位指导流量测验方法的探讨
8.
Elevation-azimuth type antenna pedestal
俯仰-方位型天线座
9.
Calculation of celestial body azimuth with compass error by celestial observation based on CAD
基于CAD的天测罗经差天体方位计算
10.
a law stating that the ratio of the square of the revolutionary period (in years) to the cube of the orbital axis (in astronomical units) is the same for all planets.
说明所有行星的运行周期的平方（年）和轨轴的三次方（天文单位）的比例都一样的定律。
11.
The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies and phenomena.
天文学外层空间事物的科学研究，尤指天体及天文现象的位置、大
12.
A New Method to Enhance Astronomical Sky Survey
一种提高天文巡天探测能力的新方法
13.
Williams of the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts, has helped in determining the astronomical position of this asteroid.
设在马萨诸塞州剑桥国际天文协会小行星中心的威廉斯曾帮助确定这颗小行星的方位。
14.
He is not only a gifted thinker, but one who can write on technical subjects with great clarity and simplicity.
他不仅是一位具有天赋的思想家，而且可以用简洁明了的语言撰写技术方面的文章。
15.
Abstract: In this paper, a method is described, in which a single-chip processor is used to control variable frequency speed regulationg equipment to locate the antenna of ground-based phased array radar.
文摘:主要阐述了运用单片机控制变频调速器实现地面相控阵雷达天线定位的方法。
16.
the branch of astronomy that deals with the measurement of the position and motion of celestial bodies.
天文学中有关天体位置与运动的测量的分支。
17.
The accuracy of the position obtained by this method is higher than that of the traditional celestial fixing.
其船位精度较传统的一般天文定位的精度要高。
18.
The distance from the sun to earth is one astronomical unit.
太阳到地球的距离即为一个天文单位，