摘要
为了进一步提高扰动重力垂直梯度的计算精度，提出采用分层抽样法、对偶变量法和基于分层抽样的对偶变量法来计算扰动重力垂直梯度，并对以上三种改进MonteCarlo方法的计算表达式和误差表达式进行了理论推导，结果表明改进后的MonteCarlo方法误差数量级可降低到10^-6。
In order to enhance the accuracy of computing the disturbing gravity vertical gradient further, The Monte Carlo method based on group sampling, dual variable or group sampling ＆ dual variable to compute was presented. And the expression of computation and errors by three methods was deduced theoretically. The results show that the minimum error of the improving Monte Carlo methods is 10^-6.
