Abstract:Point mass model is widely used in physical geodesy, but several challenges are faced in achieving high performance when solving linear equations. This paper presents a stratified residual point mass model based on window control, which converts the dense linear equation into sparse format. An 112 896-order sparse linear equation is solved on an ordinary computer. In order to illustrate the practicability of window control method, an experiment is carried out to calculate disturbing gravity at various altitudes. The performance results demonstrate that window control method achieves better precision and efficiency compared with traditional methods and is very well suited for large scale point mass construction.