利用GOCE卫星轨道反演地球重力场模型  

Recovering Earth's Gravitational Field Model Using GOCE Satellite Orbits

作　　者：游为[1] 范东明[1] 贺全兵[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,成都市二环路北一段111号610031

出　　处：《武汉大学学报（信息科学版）》2012年第3期294-297,共4页Geomatics and Information Science of Wuhan University

基　　金：西南交通大学优秀博士论文培育基金资助项目(1003);西南交通大学博士创新基金资助项目(09006)

摘　　要：根据积分方程法反演地球重力场的数学模型,利用GOCE卫星2009-11-02～2010-01-02共61d的精密轨道数据反演了几组地球重力场模型。结果表明,GOCE卫星轨道能有效提取地球重力场的长波信息,弥补了GOCE卫星重力梯度带宽的限制,在106阶次的大地水准面误差为±9.6cm,该阶次精度优于EIGEN-CHAMP03S及GRACE卫星两个月轨道反演地球重力场的精度,但由于两极空白,反演的带谐位系数精度偏低。联合GOCE及GRACE卫星轨道反演的模型在106阶次的大地水准面误差为±6.9cm,弥补了GOCE卫星轨道的缺陷。Mathematical models of integral equation approach to recover the Earth＇s gravitational field have been presented.Several gravitational field models have been recovered based on GOCE orbits of 61 days from 2009-11-02 to 2010-01-02.The results show that the long wavelength information of gravitational field can be effectively extracted from GOCE orbits,which complements the band-limitation of GOCE gradiometers.The geoid height error is ±9.6 cm with degree and order 106.The precision is higher than that from EIGEN-CHAMP03S and GRACE model from 2 months orbits.But the precision of zonal coefficients is low due to the polar gap.The geoid error of the model which combines the orbits of GOCE and GRACE satellites is ±6.9 cm with degree and order 106,which complements the orbital deficiency of GOCE satellite.

关 键 词：GOCE卫星 积分方程法 大地水准面 卫星轨道 

分 类 号：P223.0[天文地球—大地测量学与测量工程]