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中文摘要：
提出了利用高阶地球重力场模型快速模拟GOCE卫星重力梯度沿轨道观测值的方法。首先，由快速傅立叶变换（fast Fourier transform，FFT）技术快速计算球面格网数据；然后，用球面格网数据内插沿卫星轨道重力梯度观测值。由球谐展开式直接计算的沿轨观测值与内插得到的观测值的比较结果说明，该方法快速有效。
英文摘要：
The direct computation with the high-degree gravity field model is time-consu- ming. We studied a method of fast simulation of GOCE satellite gravity gradient observations along the orbit with high-degree gravity field model. We proposed a method, which uses the gridding data from the gravity field model on the different height spherical surfaces to interpolate the points along the orbit. The numerical analysis results based on the compari- son between the interpolated values and the ones from the direct evaluation with the spherical series expansion show that this method is rapid and valid.
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