国家重力基准控制测量的发展及所面临的两个问题

THE DEVELOPMENT OF CHINA GRAVITY REFERENCEMEASUREMENT AND TWO PROBLEMS BEFORE IT

文章简述了建国后国家重力基准所经历的两个发展阶段,即1957年系统和1985年系统。文中分析了这两系统各自的精度和主要技术特点;讨论了当前国家重力基准系统使用中所面临的两个迫切和重要的实践问题;1)对旧系统的精度评价及其向新系统的转换;2)受新网控制的各类高精度附加重力测量,如国家重力一等网的数据处理方法。

Abstract This paper makes a brief description of the two developing stages that the National gravity reference system has experienced; the system of 1957 and that of 1958. It analyses the respective precision and main technical cha racters of these two systems and discusses two urgent and important practi cal problems that the national gravity reference system is faced with in its performance: 1) the evaluation of the precision of the old system and the trans formation of this system into the new one; 2) the data-processing method for various sorts of high-precision additional gravity measurement controlled by the new net, e. g., the Grade J National Gravity Net.