中丹水平子午环准直差稳定性的研究  

The Stability of Collimation Error for the DCMT

作　　者：李焕信[1] 刘少民 方福胜 章菁 李志刚[1] 

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2期117-121,共5页Publications of The Shaanxi Astronomical Observatiory

摘　　要：经典子午环有一系列仪器误差,诸如方位差、水平差、准直差、轴颈差等。在观测结果中,这些误差必须予以有效地扣除,以确保测时测纬的精度。因此,研究这些误差并采取有效的消除方法,对测量仪器来说是尤为必要的。由于陕西天文台中丹子午环的结构与传统子午环有许多不同之处,所以对这些仪器的误差测定和研究中也必然有它自己的特点。关于方位差和旋转轴的误差,陕西天文台子午环课题组有关同事已有专门论文涉及到这一问题。本文重点叙述的是其准直差的测定和研究。从结果可见,水平子午环的准直差有良好的稳定性。There are some instrumental errors for a tranditional meridian circlde such as azimuth error, collimation error, level error and pivot error. They affect the accuracy for determination of the time and the latitude. So, it is necessary to find a way to deduct them. For the DCMT which is a kind of new instruments and is different from the traditional meridian circle, the collimation error was discussed in this paper. And it is shown that this error depends on angle between S1 and S2 mirrors. The results about the change of collimation error with temperature are shown in table 1. The collimation error seens to be stable.

关 键 词：水平子午环 准直差 稳定性 子午环 

分 类 号：P111.31[天文地球—天文学]