Algorithm for determining the analytical model parameters of the navigation satellites motion

Analytical model, that includes Keplerian elements and related corrections, is used for description of the navigation satellites motion. Correspondences for the position vectors calculation and velocity vectors calculation on base of the analytical model parameters are presented. Partial derivatives of the position vector are deduced. Algorithms for determining the analytical model parameters on base of measurements of the navigation satellite’s position vector are presented. The C program is attached (ftp-server).