光电经纬仪测量元素误差是外弹道测量中最主要的误差源。
Measurement error from the photoelectric theodolite is the main error in the ballistic trajectory measurement.
本论文主要目的在于工程研究中央控制站实时状态下的数据处理问题，实现经纬仪测量系统实时引导控制功能。
This paper mainly works on the real time data processing methods for the central control station to realize the guide and control function in the theodolite system.
中国还在经纬仪附近发射了气象气球来测量大气温度和压力变化，以更好地估计折射误差。
The Chinese also launched weather balloons near their theodolites to measure atmospheric temperature and pressure changes to better estimate refraction errors.
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