GOCE卫星重力计划及其应用

GOCE Program and its Applications

基于CHAMP和GRACE卫星,GOCE((Gravity Field and Stead-state Ocean Circulation Explore)是欧空局(ESA)的一颗重力场和静态洋流探测卫星。利用它可得到空间分辨率为200-80 km的全球重力场模型和1 cm精度的大地水准面。简要介绍了目前重力卫星的发展现状与其局限 性,详细叙述了GOCE卫星的组成、科学目标、测量原理、在地球物理等学科中的重要应用,并 提出GOCE等重力卫星资料在我国的应用设想。

Current knowledge of the earth's gravity field, as derived from CHAMP and Grace's data, is incomplete, and the determined geoid can not reach the precision required by geophysics and the subjects related to Earth Science. GOCE (Gravity Field and Stead-state Ocean Circulation Explore), which will be launched by ESA in 2006, is the Earth Explorer Gravity Field and Steady-State Ocean Circulation Core Mission satellite based on CHAMP and GRACE. It can determine the geoid with an accuracy of 1 cm and spatial resolution (half wavelength) at length scales between 200-80 km. This paper briefly introduces the current gravity satellites' developing status and their limitations. The GOCE satellite's instruments, its scientific objectives and surveying principle, the important applications in geophysics field, etc., are discussed in detail in this paper. Finally, the applications of the data sources which are generated by GOCE and other gravity satellites are conceived in our country.