极轴式望远镜系统误差修正方法研究

为提高极轴式望远镜的测量精度,借鉴地平式望远镜的系统误差修正方法,推导了基于轴系和球谐函数的极轴式望远镜系统误差修正模型,在分析2种误差修正模型误差项不足的基础上,探索性地提出了一种新的误差修正模型——改进球谐函数系统误差修正模型。对实际测星数据进行误差修正的结果表明,进行改进球谐函数系统误差修正后,精度在时角和赤纬方向上比其他方法提高了50%。

Correction of the System Errors of Equatorial Telescopes

To improve the measurement accuracy of equatorial telescopes,this paper deduces a system error correction model based on axial error and spherical function by drawing references from the system error correction model of horizon telescopes.Following analysis of the disadvantages of the two error correction models,a new system error correction model with improved spherical function is proposed.The results of star observation data correction with the models show that the accuracy of the modified spherical function model is 50% higher than other methods in both right ascension axis and declination axis.