文章基本信息

标题：Study on recovering the Earth’s potential field based on GOCE gradiometry
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作者：Wenbin Shen ; Jin Li ; Jiancheng Li 等
期刊名称：Geo-spatial Information Science
印刷版ISSN：1009-5020
电子版ISSN：1993-5153
出版年度：2008
卷号：11
期号：4
页码：273-278
DOI：10.1007/s11806-008-0132-6
出版社：Taylor and Francis Ltd
摘要：Given the second radial derivative Vrr(P)|∂S of the Earth’s gravitational potential V(P) on the surface ∂S corresponding to the satellite altitude, by using the fictitious compress recovery method, a fictitious regular harmonic field rrVrr(P)* and a fictitious second radial gradient field Vrr*(P) in the domain outside an inner sphere Ki can be determined, which coincides with the real field Vrr(P) in the domain outside the Earth. Vrr*(P) could be further expressed as a uniformly convergent expansion series in the domain outside the inner sphere, because rrVrr(P)* could be expressed as a uniformly convergent spherical harmonic expansion series due to its regularity and harmony in that domain. In another aspect, the fictitious field V*(P) defined in the domain outside the inner sphere, which coincides with the real field V(P) in the domain outside the Earth, could be also expressed as a spherical harmonic expansion series. Then, the harmonic coefficients contained in the series expressing V*(P) can be determined, and consequently the real field V(P) is recovered. Preliminary simulation calculations show that the second radial gradient field Vrr(P) could be recovered based only on the second radial derivative Vrr(P)|∂S given on the satellite boundary. Concerning the final recovery of the potential field V(P) based only on the boundary value Vrr(P)|∂S, the simulation tests are still in process.
关键词：GOCE gradiometry; second radial gradients; second radial gradient field recovery; potential field recovery