用J_6级经纬仪进行竖基线视差法测量的研究

竖基线视差法测量一般必须使用精密的经纬仪,例如J_2级光学经纬仪,才能达到满意的测距精度。但目前我国基层生产单位及高校测量教学中主要是使用J_6级光学经纬仪,用这种经纬仪进行竖基线视差法测量是否可行,如何提高竖基线视差法的测距精度,目前国内外有关文献中尚未见到报导。本文提出一种新的观测程序,使J_6级光学经纬仪测量视差角的精度提高到4″,从而提高了测距的精度。文中对该法的误差来源及精度进行了详细的分析,最后列举实验数据。

Studies on the Measurement of Subtense Method with Vertical Staff Using J6 Order Theodolite

The measurement of subtense method with vertical staff generally requires the use of precision theodolites such as J2 order optical theodolites.In this case,a greater accuracy in measuring distance might be obtained However,the basic production units and the universities in this country chiefly use J6 order optical theodolites.Is it valuable to the measurement of subtense method with vertical staff to use J6 order theodolite? How to increase the accuracy in measuring distance using this method ? At the present time,the measurement of subtense method with vertical staff using J6 order theodolite has not been reported in literature in this country or abroad In order to resolve this problem,a new observation program is presented in this paper,which indicates the accuracy of the subtense angle was increased 4" with the J6 order optical theodolite,and thus the accuracy in measuring distance was increased.The sources of error and the accuracy of the method are discussed in detail and the experiment data are shown at the end of the paper.