指出星表误差可以看作模型不确定性的一部分，采用鲁棒滤波技术进行处理。
It is shown that the pulsar's position error can be seen as model uncertainty, and the effect of the uncertainty can be reduced by using the robust filtering technique.
对影响中国古代星表数据的各种误差进行了讨论。
A discussion of several errors of the data of ancient star catalogues of China is made.
利用这个期间的资料，初步研究了FK_4星表的系统误差和改进光行差常数等问题。
Using the data obtained during this period, the problems of determining the systematic error of FK_4 catalog and improving the constant of aberration are investigated.
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