【摘要】 本文论述了经纬仪照准部固定状态下定向的三种方法：中天法，记时摆幅法Ⅰ和Ⅱ。根据试验和实际定向的大量资料，分析了测量精度，提出了提高精度的措施，并制定了相应的限差。重点探讨了悬带零位误差性质及零位改正问题，得出了有益的结论。更多还原

【Abstract】 :This paper describes three orientating methods with gyrotheodolite in alidade clamp-ed state: transit method, timing-amplitude methods Ⅰand Ⅱ. Based on a large amountof data obtained from practical orientating experiments, an analysis of measuring preci-sion has been made. Measures for increase of accuracy are suggested and correspondingtolerances worked out. In the discussion, emphasis is placed on the property of zero po-sition error of suspeflsion tape and the correction for this error. Some useful conclusionshave been drawn.更多还原