Hipparcos and Tycho Catalogues

Determining the Astronomical Refraction and Building the Radio Wave Refractive Delay Model Measured(Ⅱ)——Using Hipparcos Catalogue as Working Catalogue;

测定天文大气折射和建立电磁波折射延迟实测模型(Ⅱ)——采用依巴谷星表作为工作星表

By means of the central overlapping technique and the iterative process, the highly precise positions and proper motions of 54 stars, including 16 Hipparcos stars in the two plate areas are obtained.

利用上海天文台佘山４０ 厘米折射望远镜拍摄的２ 个底片天区１５ 张照相底片上的３１ 次观测，以ＡＣＴ 星表作为初始参考星表，按中心重叠法进行归算处理，得到了１６ 颗依巴谷星和３８ 颗场星的高精度位置和自行结果，其中依巴谷星的赤经和赤纬标准误差的平均值分别为１０ 。

By means of the central overlapping technique and the iterative process, high-precision positions and proper motions of 28 PPM stars, including 6 Hipparcos stars in the region of radio source 0316+413 are obtained.

本文用佘山４０厘米折射望远镜拍摄的历元间隔约为３０年的９张底片上共１７次露光观测，以ＰＰＭ星表作为初始参考星表，用中心重迭法进行叠代归算，得到了射电源０３１６十４１３附近的２８颗星的高精度位置和自行，其中６颗为依巴谷星，这些依巴谷星的赤经自行和赤纬自行内部误差的平均值分别为■年和■年。