Uncertainty in the Estimate of Position and Velocity Along a Lunar Trajectory Using Individual Earth-Moon Angular Measurements in a Recursive Navigation Theory

摘要

The purpose of the study is to determine the feasibility of using a recursive navigation theory in which individual earthmoon angular measurements (fixes) are processed as they are made and combined with the current best estimate of position and velocity to produce an improved estimate. Estimates made with an earth-moon fix interval of 5 minutes or less are compared to estimates made with conventional earth-star, moon-star fixes of 15 minutes. Results show the earth-moon fix to be a feasible technique. (Author)