建立经纬度异常变化三角监测网的观测纲要和工作星表

The Observational Programs and Practical Star Catalogue for the Triangular Monitoring Network of Abnormal Change in the Longitude and Latitude of an Observing Station

为了在云南省及周边地区强地震前提供天文经、纬度异常变化的信息而建立三角监测网的需要。本文叙述了在各观测站都采用的两种观测纲要的编制方法。一是8个方位的观测纲要，通过一年观测数据的比较，拟合出各观测站的本地天文大气折射实用模型；二是长期使用的仅在子午方向观测的纲要。文章根据这种测量对工作星表的要求，在分析了依巴谷星表的亮星分布情况后，决定仅选用4．0—6．0mag的光谱型B、A、F、G、K型的依巴谷星。这一选星范围，也为测量仪器口径的选择提供了依据。

In order to derive the information of abnormal changes in the astronomical longitude and latitude of an observing station in the Yunnan Provence before a nearby strong earthquake, we propose in this paper two methods to set up observational programs. One is of the eight-direction observation, and the other is of the observation along the meridian. From the discussion we conclude that Hippareos stellar objects with magnitudes 4.0 to 6.0 and among the five spectral class as B, A, F, G and K are adequate for the measurement. The range of magnitude also provides the basis for the choice of apertures of measuring instruments.