The Generation Of An Accurate And Uniform Time Scale With Calibrations And Prediction

Author : Kazuyuki Yoshimura
Publisher : Forgotten Books
ISBN 13 : 9781528526548
Total Pages : 70 pages
Book Rating : 4.5/5 (265 download)

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Download or read book The Generation of an Accurate and Uniform Time Scale with Calibrations and Prediction (Classic Reprint) written by Kazuyuki Yoshimura and published by Forgotten Books. This book was released on 2017-10-27 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Generation of an Accurate and Uniform Time Scale With Calibrations and Prediction In a recent paper Mungall compares and discusses differences between time scales which do or do not use a primary standard, and points out the problems in the latter time scale. It was also suggested in a recent conference [5] that a study be conducted on how to have concurrently both an accurate and uniform iat scale (the International Atomic Time scale). In order to accomplish this, a primary standard must be tightly related to the generation of the time scale, namely it must be used to calibrate periodically secondary standards (or clocks) of lower accuracy. Periodic calibration is usually necessary because the primary standard can be operated only for brief periods and because frequent re-evaluations of its accuracy are necessary. In this paper, we predict the time change for each clock between calibration intervals 'by filtering calibrated frequency data and derive a matrix equation for the optimum filter response functions which make the mean square predicted time error a minimum. We apply these results to the generation of a time scale from several clocks. We find that we can predict the correct time with quite a small error using a small number of clocks (even one), and thus generate a time scale whose accuracy is limited by the accuracy of the primagy sta'ndard-the best case. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.