中文摘要：

给出计算航空重力数据延拓的泊松积分公式,通过向上延拓评定航空重力数据的精度。基于逆泊松积分,应用快速傅里叶变换算法和迭代法求解重力异常,进行向下延拓,通过对延拓结果和地面实测数据的比较分析,评价延拓方法的精度,并讨论在向下延拓算法中引入的低通滤波器的选择。实验表明,快速傅里叶变换算法的结果较好。

英文摘要：

This paper presents the formula of the inverse Poisson integral, which is used for continuation of airborne gravity anomaly and to assess the accuracy of airborne gravity data. The downward continuation of airborne gravity data is performed by FFT and iterative methods. The accuracy is evaluated based on the com- parison and analysis of downward continued results with terrestrial real gravity data. The choice of low-pass filters for downward continuation is also discussed. The experiment shows that the FFT method obtains bet- ter results compared with those derived from iterative methods.