Simplified Selection of Optical Fix Data and a Simplified Guidance Technique

摘要

A selective strategy for optical measurements in interplanetary navigation is shown in which the geometry of the situation dictates the decision. Variable time of arrival guidance is explained and correction velocities are computed using perturbation method and a simplified method based on the line of sight to the destination. The perturbation method is used as the ideal case for finding an empirical relation based on the line of sight. The empirical method derived could be used to check the computer solution in an actual flight since it may be easily calculated manually by an astronaut. (Author)