Utilization of 'a priori'Estimates in ICBM Trajectory Determination.

摘要

There are two particular linear estimation techniques frequently used by various agencies and test ranges to derive ICBM trajectory coordinates from both test range tracker measurements and 'a priori' estimates of parameters pertinent to accurate trajectory solutions. Whenever each of the techniques is applied to the same set of tracker measurements and 'a priori' estimates, significantly different trajectory solutions and solution uncertainties are obtained. This disturbing fact has motivated an analysis and comparison of the techniques that are of major interest in this report. An expository account of the techniques that consists of development, description, and discussion of their basic structures is presented. The material is intended to provide information or knowledge that can be of use when either of the techniques is a candidate for trajectory estimation problems, and to reveal pertinent rationale that accompany solutions derived from each technique. (Author)