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中文摘要：
阐述了基于虚拟压缩恢复法导出的虚拟向下延拓法，该法从理论上解决了重力场的向下延拓问题。为了检验理论的正确性，选取EGM96模型进行了模拟实验检验，实验结果支持局部虚拟向下延拓法。同时，对观测值加进随机误差的情形也进行了模拟实验检验，结果表明，局部虚拟向下延拓几乎不损失精度。
英文摘要：
Based on the fictitious compress recovery approach the fictitious downward continuation is clarified, which has theoretically solved the downward continuation of gravity field. To test the correction of the theory, simulation experiments are executed using EGM96 model. Simulation experiment results support the local fictitious downward continuation approach. Meanwhile, in the case that the observation values contain random errors, the simulation experiment tests show that the local fictitious downward continuation approach is stable, almost not losing the accuracy.
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