Based on the steepest descent method,we present an efficient numerical method for computing the sine and cosine transform in resistivity measure,and present theoretical analysis of the error bound.

• 在最速下降法的基础上,给出了地球物理勘探中计算一种正余弦变换的一个有效数值算法,同时对新算法产生的误差进行了理论分析,并用数值实验对理论分析进行了检验。