astrolabe

Mariners were also able to fix their latitude, by using an instrument called an astrolabe.(海员们还可使用星盘这种仪器确定纬度。)

A study of the rule of the diurnal variation of latitude and longitude, obtained with the astrolabe in Shanghai, leads us to the hypothesis that the diurnal var...(在此基础上求出了组间差变化率曲线，进而分析研究了上海地区等高仪经纬度测量值周日变化的规律。)

The observing result of a photo electric astrolabe is largely affected by the processing method of photo counting data.(在光子计数资料的处理方法设计不完善时，有可能会大大影响光电等高仪的观测结果。)

On the astrolabe, an off - centered circle represents the orbit of the sun - the ecliptic.(在星盘上，一个偏心的圆代表了太阳的运行轨道——黄道。)

The astrolabe had long been the primary instrument for navigation, having been introduced in the eleventh century.(自11世纪星盘被引入以来，它一直都是航海的重要工具。)