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.
讨论了小型光电人卫跟踪仪的ALT ALT机架原理，分析证明采用这种机架形式没有天顶盲区、跟踪速度和加速度较小。
In this article, we discussed the principle of ALT-ALT mount for small satellite tracker and proved this mount has no blind area near the zenith, need small tracking velocity and acceleration only.
星光跟踪仪提供天顶距的测量数据，红外高度测量仪提供航天器的高度数据。
The measurements of the spacecraft star navigation system are provided by star tracker and infrared accelerometer.
星光跟踪仪提供天顶距的测量数据，红外高度测量仪提供航天器的高度数据。
The measurements of the spacecraft star navigation system are provided by star tracker and infrared accelerometer.
应用推荐