本文叙述了子午星表系统误差的主要来源，等高观测的特点及等高星表的不足之处。
In this paper, the main sources of the errors in a meridian catalog, the characteristics of the equal altitude observation and the shortages of an equal altitude catalog are described.
本文叙述了子午星表系统误差的主要来源，等高观测的特点及等高星表的不足之处。
In this paper, the main sources of the errors in a meridian catalog, the characteristics of the equal altitude observation and the shortages of an equal altitude catalog are described.
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