利用航空测量数据向下延拓得到不同高度的位场数据可以提高测量成果的综合利用率。 Landweber 迭代法是一种有效解决位场向下延拓的实用方法。鉴于 Landweber 迭代法的收敛速度比较慢，提出采用加速 Landweber 迭代法，推导得到两种迭代法对应的波数域算子并通过仿真分析算子的滤波特性，最后结合模型实例验证了所提出的加速 Landweber 迭代法不仅能有效进行位场向下延拓，而且比 Landweber 迭代法更高效。%Aeromagnetic data downward continuation to different altitudinal data of field can improve the utilization percent of su rvey data.Landweber iteration method is an i mpactfu l way to ravel out the downward continuation of potential field.Inview of the sl ow convergence speed of Landweber iteration method,an accelerated Landweber iteration method is used.Then,two wave number doma in operators of two iteration methods are deduced and the filtering cha racter-istics of operators are analyzed. Finally,the results of the numerical simulations show tha t the accelerated Landweber iteration method can not only deal with downward continuation of potential field,but also more efficient than Landweber iteration method.
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