利用GOCE卫星轨道数据反演地球重力场模型
Recovery of Earth’s Gravitational Field Model Based on GOCE Satellite Orbits
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摘要: 在能量守恒法和短弧长积分法的基础上,利用Fortran程序语言编写了两套计算程序,分别利用两种方法计算了62d的GOCE轨道得到Model_ENG(能量法)和Model_SAC1(短弧长积分法)两组模型,利用短弧长积分法计算了近1a的GOCE轨道得到Model_SAC2。对两种方法反演的结果,以及利用其他低轨卫星反演的结果进行了比较,结果显示,短弧长积分法的精度要高于能量守恒法,Model_SAC2精度高于EIGEN-champ03s和90dGRACE轨道反演的模型Model_GRA,并且在30阶以前与国际上反演的GOCE-only模型GO_CONS_GCF_2_TIM_R3精度一致。Abstract: Two Fortran programs were compiled based on energy balance approach and short arc integral approach respectively.Both ModelENG（energy balance approach） and ModelSAC1（short arc integral approach） were recovered based on 62 days GOCE orbits,while ModelSAC2 was recovered based on 1 a GOCE orbits.The results show that short arc integral approach has a higher precision than energy balance approach.The precision of the ModelSAC2 is higher than EIGEN-champ03s and ModelGRA,recovered based on 90 days GRACE orbits.ModelSAC2 and GOCE-only model GOCONSGCF2TIMR3 have the same precision before 30 degrees.
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