卫星重力与地球重力场  

Satellite Gravity Technique and Earth Gravity Field

作　　者：宁津生[1] 罗佳[1] 王正涛[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《地理空间信息》2008年第1期1-6,共6页Geospatial Information

基　　金：国家自然科学基金资助项目(40637034);地球空间环境与大地测量教育部重点实验室开放基金资助项目(905152533-05-08)

摘　　要：卫星重力探测技术可获取全球均匀覆盖的地球重力场信号。以GRACE为代表的卫星跟踪卫星(satellite-to-satellite tracking,SST)计划为人类提供了前所未有丰富的中长波尺度的全球地球重力场信息。本文包含两部分研究一是给出基于能量守恒原理的GRACE SST重力观测方程,并采用此方法以实测GRACE观测数据求解得到120阶的GRACE地球重力场模型WHU-GM-05,并同国际上具有代表性的类似模型进行了分析比较;二是采用解析方法分析了SST观测系统中KBR、ACC、星载GPS等有效载荷误差与获取地球重力场信号性能的响应,为我国SST设计和实施提供参考。The global homogeneously covering gravity single can be collected by satellite gravity techniques. The satellite-to-satellite tracking （SST） technique, such as GRACE, provides all-time abounding gravity information in long and middle wave-length bands. In this paper, the GRACE SST gravity observation equation based on conservation of energy was deduced and the degree and order 120 earth gravity model, WHU-GM-05, was calculated with GRACE data. The WHU-GM-05 model was compared with those advanced models calculated by some international research organizations. And then the errors of KBR, ACC and GPS respect to the satellite gravity system performance were analyzed with analytic methods. All above results will provide the reference and support for Chinese SST project.

关 键 词：卫星重力 地球重力场 SST 能量守恒 

分 类 号：P223[天文地球—大地测量学与测量工程]