GENERATION OF THE LUNAR EPHEMERIS ON AN ELECTRONIC COMPUTER

摘要

This report describes the method of integration that is used in a Lincoln Laboratory computer program (the Planetary Ephemeris Program) to determine as functions of time the position and velocity of the Moon and the partial derivatives of these quantities with respect to initial conditions. The method consists of numerically integrating the differential equations for the differences between the positions, velocities and partial derivatives in the true lunar orbit and in Brown's mean lunar orbit.