天顶仪

天津纬度站于1962、1963年继续用180毫米天顶仪进行纬度变化的观测。

Latitude observations with the zenith telescope ZTL-180 have been continued at the Tientsin Latitude Station .

数字天顶摄影仪使用面阵CCD芯片对星空进行成像，对拍摄的恒星进行定位、识别和解算，以获取相关的测绘信息。

Digital zenith camera use area array CCD to get the stars image , to locate , identify and calculate the stars .

数字天顶摄影仪的图像处理

The Image Processing in The Digital Zenith Camera

天顶摄影仪轴系误差对垂线偏差测量精度的影响及其修正方法

Effect of digital zenith camera axis error on measurement precision of vertical deflection and its correction

由于机械加工精度和常平架的调平精度有限，天顶摄影仪的视轴、垂直旋转轴与铅垂线总是存在不一致，导致测量精度与理论精度存在很大的偏差。

Due to machining accuracy and limited leveling precision of gimbals , there is always an inconsistency between the visual axis and the vertical rotational axis of the digital zenith camera and the plumb line , which leads to a big deviation between measurement precision and theoretical precision .