人造卫星目视跟踪打印经纬仪的改造

Improvement of the Visual Tracking Theodolite for Satellites

对云南天文台人造卫星目视跟踪打印经纬仪进行了改造。在望远镜的两轴上加装了高分辨率的园感应同步器，数显表，实现了数字显示。经过改造后的望远镜测角精度由原来±３０角秒提高到±１角秒；分划板刻线由原来２角分改进为１５角秒；静态定位精度优于２０角秒，比改造前的仪器提高了一个数量级。

By installing the inductosynchronizer and the digitizer to the azimuth elevation axes,we have improved the visual tracking theodolite for satellites in Yunnan Observatory.With the new encoders, the precision of angle-measuring of the remade telescope has been improved to one arc-second from 30 arc-seconds, and the precision of graduator on the field of view has been improved to 15 arc-seconds from 2 arc-munits. The precision of the static orientation is better than 20 arc-seconds, improved by an order of magnitude.