ICGEM最新重力场模型精度比较分析  

A Comparative Analysis of the Accuracy of ICGEM's Latest Gravity Field Model

作　　者：侯博文 黄强[2] 

机构地区：[1]中国地震局第二监测中心,陕西西安710000 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《科技创新与应用》2018年第13期10-12,共3页Technology Innovation and Application

摘　　要：人类有关于地球重力场的研究可以追溯到上个世纪,重力场的研究一直是地球物理、大地测量的核心部分。地球重力场模型就是将全球重力场模型化、简单化,它的优点是可以很方便地计算出有关重力场的各种数据。其中包括高程异常、重力异常、大地水准面差距、垂线偏差等。所以说重力场模型的建立对于重力场理论研究有着极大的推动作用。因为我国采用的是正常高高程系统,所以似大地水准面精化对高程测量就有很高的研究价值,实质上就是确定高程异常值。利用重力场模型可以在很高的精度保证前提下快速确定一个区域的高程异常值。德国地学中心的网站上公布了从1966至今的主流重力场模型,文章主要研究内容就是对目前国际上主流的几个重力场模型进行精度的比较和分析。The study of earth gravity field can be traced back to the last century. The study of gravity field has always been thecore of geophysics and geodesy. Earth gravity field model is to model and simplify the global gravity field, and its advantage lies inthat it can easily calculate all kinds of data about gravity field. It includes height anomaly, gravity anomaly, geoid difference, verticaldeviation and so on. Therefore, the establishment of gravity field model plays a very important role in the study of gravity field theo鄄ry. Because the normal high elevation system is used in our country, the quasi geoid refinement is of great value in the study ofheight measurement. In essence, it is to determine the abnormal height value. Using the gravity field model, the height outliers ofaregion can be quickly determined under the premise of high precision. The main gravity field model from 1966 to now has beenpublished on the website of German Geoscience Center. The main content of this paper is to compare and analyze the accuracy ofseveral gravity field models in the world.

关 键 词：地球重力场模型 高程异常 精度分析 大地水准面差距 

分 类 号：P223[天文地球—大地测量学与测量工程]