中文摘要：

南极冰穹C（DomeC）的选址结果显示：DomeC具有寒冷干燥、红外背景辐射低、可连续3—4个月观测、空气明净、透过率高、风速低等特征，是比地面上任何中纬度台址都好的天文观测台址．而由我国最先登陆的内陆最高点冰穹A（DomeA）被国际天文界广泛认为可能是比DomeC更好的天文台址．近3yr来，中国科学院南极天文中心领导开展DomeA的台址测量工作，初步结果表明DomeA作为天文台址具有巨大优势．但是到目前还没有获得直接用于衡量天文台址在光学观测方面的主要参数一视宁度数据．介绍了中国科学院南京天文光学技术研究所自行研制的我国首个用于DomeA的自动视宁度测量仪，基于一台口径35cm的商用望远镜进行硬件改造和软件开发，使其能在DomeA低温低压环境下进行自动观测和数据处理．目前该仪器已随“雪龙号”科考船起运南极，于2011年初安装到DomeA并开始测量．起运前，在兴隆观测站与中国科学院国家天文台（国台）选址组的一台视宁度监测仪进行了对比测量，对软件、硬件和装调方法进行了检验验证．

英文摘要：

Antarctic site testing works have shown that Dome C is an extremely good astronomical site on the earth. Dome C is better than any other mid-latitude sites because of the following advantages： extremely dry, cold, low radiation of infrared background, clear air, low wind speed, the absence of aerosols and light pollution, as well as continuous observations lasting for three to four months. International astronomical communities widely predict that Dome A with a higher altitude may be better than Dome C as an astronomical site. In the last three years, although site testing works at Dome A led by Center for Antarctic Astronomy of Chinese Academy of Sciences, have initially confirmed the great advantages of Dome A as an astronomical site, the seeing data, which is the primary parameter directly used to compare astronomical sites in optical observations, has not been obtained until now. We have modified the commercial telescope with a diameter of 35 cm and developed software to function as a DIMM （Differential Image Motion Monitor） which could simultaneously monitor both seeing and isoplanatic angle at Dome A automatically. At present, the instrument has been shipped by ＂Xuelong＂ exploration ship, then was installed in early 2011 at Dome A and began to work. Before shipment, software, hardware and aligmnent methods have been tested through comparative testing of our DIMM together with another DIMM from Xinglong Observing Station of National Astronomical Observatories.