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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%。
In order to improve the measuring precision of polar telescope and learn from the systematic error correction method of the telescope, the system error correction model of polar telescope based on axis and spherical harmonic function is deduced. After analyzing the error of two kinds of error correction model, Based on this, a new error correction model is proposed exploratoryly - improving the system error correction model of spherical harmonic function. The results of error correction on the actual satellite data show that the accuracy of the spherical harmonic system improved by 50% compared with other methods in the angle and declination direction.