中丹水平子午环水平轴的稳定性  

The stability of the Horizontal Axis of the DCMT

作　　者：李志刚[1] 李焕信[1] 方福胜 章菁 

机构地区：[1]中国科学院陕西天文台

出　　处：《陕西天文台台刊》1991年第1期23-32,共10页Publications of The Shaanxi Astronomical Observatiory

摘　　要：对中丹水平子午环水平轴的稳定性进行研究。中丹合作的水平子午环本身有自校准系统,利用此系统对我们仪器的水平轴误差(即经典仪器的枢轴误差)进行了测定。我们用目视测微器进行测量,据我们的统计,读数误差为0.10″～0.15″(随人而异)。根据本文公式(12)对观测结果进行归算,我们对水平轴的系统误差以及重复精度进行了估计。事实上,根据我们仪器的特点,影响观测精度的是水平轴的重复性。本文着重对重复性进行了详细的研究,测试结果表明,仪器水平轴的稳定性能良好。In this paper, the stability of the horizontal axis of the DCMT is investigated. Using the self-calibration system of the DCMT, the error of the horizontal axis (named axle error for traditional instrument)has been measured. With the visual micrometer the errors of the readings have been estimated to be 0.10″-0.15″(depending on the individuel observers).The observation data have been reduced according to the formula (12), and the systematic error and the repeatability for the horizontal axis are estimated. In fact, it is the repeatability of horizontal axis that would affect the precision of observations, which is decided by the characteristics of DCMT, so that, the repeatability is studied in details with Observation special interest. The results of the test Observation indicate that the stability of the horizontal axis of this instrument is fairly good.

关 键 词：水平子午环 水平轴 稳定性 

分 类 号：P111.31[天文地球—天文学]