云南省重力基本网的设计及其精度状况的分析

Research on the Design and Accuracy Analysis of Yunnan Basic Gravity Network

地球重力场作为地球本身的一种特性,是大地测量重要的研究对象,而国家重力基准网提供重力测量基准和尺度,是一切重力测量的基础。高精度的国家重力基准网在研究地球重力场、空间技术、地球动力学、海洋开发、地质勘探、地震预报和国防建设等方面都发挥着重要的作用。通过对云南省重力基本网的设计,采用等权精度评定以及加权精度评定的方法对其进行精度分析,并分析2种精度评定的方法的使用范围。

Earth gravitational field, as one of the characteristics of the earth, is a important objects of study,while National gravity base net is a foundation of all Gravity measurement, because it offers reference and scales of the Gravity measurement. High precision national gravity base net is playing an important role at the respects of research of the earth＇s gravitational field. Space technology, geo- dynamics, ocean development, geological survey, earthquake prediction, national defense construction and so on. This paper scheme out the gravity base net of Yunnan province and adopt two methods, the equal precision evaluation and the weighted precision evaluation, to analyses its precision.