船载星敏感器测星数据蒙气差实时修正方法

A Real-Time Atmospheric Refraction Correction Method for Measurement Data of Ship-Borne Star Sensors

针对船载星敏感器安装在航天测量船上而引起的测星数据如何进行蒙气差实时修正问题,在分析船载经纬仪目前使用的蒙气差修正方法和中国天文年历提供的蒙气差修正方法的修正精度的基础上,提出船载星敏感器测星数据的蒙气差实时修正方法,给出蒙气差常数R0和温度变差乘数A的改正量α的计算公式,解决了工程应用上的高精度和实时性问题;同时,在分析大气温度、大气压力对船载星敏感器测星数据蒙气差影响的基础上,提出工程应用中的气象数据采集与使用的具体方案。

A real-time atmospheric refraction correction method is presented for measurement data of ship-borne star sensors following analysis of the accuracy of current atmospheric refraction correction method used for ship-borne theodolites and that of China Astronomical Almanacs. Formulas are given for computation of constant R0 for atmos- pheric refraction and correction coefficient a for temperature multiplier A. High accuracy and real-time performance issues are solved. Finally, the influence of air temperature and air pressure on atmospheric refraction is analyzed and a scheme is proposed for collection and use of weather data in engineering applications.