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首页> 美国政府科技报告 >The Earth's Gravity Field from a Combination of Satellite and Terrestrial Gravity Data.
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The Earth's Gravity Field from a Combination of Satellite and Terrestrial Gravity Data.

机译：从卫星和地面重力数据的组合中的地球重力场。

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The long-wavelength components of the Earth's gravity field to the 8th harmonic degree obtained from artificial earth-satellite data are combined with 5degree x 5degree mean gravity anomalies obtained from 1degree x 1degree mean gravity anomalies computed from gravimetric data. The expected relationship between the data is used to construct an 'areal function'. Variations in this function are estimated by the least-squares method. Nine hundred ninety-nine unknown anomalies are computed. The maximum standard error of unit weight is plus or minus 5.1 mgal. The resultant anomalous gravity field is expressed in terms of spherical harmonic coefficients of geopotential to the 21st harmonic degree to facilitate comparisons with other solutions. The method uses the strength of both the satellite gravity solutions and the gravimetric data. The spectra of the new solution compare favorably with the power spectra of other available satellite and/or combination solutions.

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