中文摘要：

针对奇台110m口径射电望远镜高指向精确度特点，在现有天线指向模型的基础上，推导了轨道误差源(轨道不平度)对指向精确度影响的关系模型。基于功率谱函数傅里叶级数系数归并法，建立了天线轨道不平度数学模型。针对国外某完全焊接式50m天线，轨道水平度测量数据，通过实验数值仿真，采用查表法补偿轨道不平度造成的天线指向误差，使俯仰角误差精确度提高了1.5″，对高指向精确度天线实现的研究提供了有力支持。

英文摘要：

For the characteristic of high pointing accuracy of QiTai110m diameter radio telescope,a pointing model is deduced on the relationship between the pointing error and track flatness.Based on the power spectrum function and Fourier series coefficients merging method,a mathematical model of antenna track roughness is established.Through the experiment on a foreign50m antenna with completely welded track,antenna elevation angle error is decreased by1.5″,which provides strong support to achieve high pointing accuracy of antenna research.