This report contains operating instructions for a computer program designed to provide a best estimate of the accuracy with which the motion of a vehicle can be determined on the basis of either inertial guidance measurements or external tracking, or both. The performance of the moving vehicle is described by the estimated deviation from its nominal performance. The program, developed by and used at RAND, should prove useful in the fields of ballistic missile accuracy, range instrumentation, and navigational satellites. 72 pp.
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