A new method utilizing zenith observing to calibrate star sensor was proposed.
提出了一种利用天顶观测来进行星敏感器标定的新方法。
2
The grazing occultation of the star by the Moon is observed in the zenith at the Earth's equator.
某星被月球的掩星现象出现在地球赤道的天顶上。
3
They are the curvature corrections for recording time at the determined zenith distances when a star passes the prime vertical and the meridian circle.