Accuracy of time comparison derived from reception of LORAN-C and Global Positioning System time signals
Article first published online: 7 DEC 2012
Copyright 1992 by the American Geophysical Union.
Volume 27, Issue 5, pages 545–551, September-October 1992
How to Cite
1992), Accuracy of time comparison derived from reception of LORAN-C and Global Positioning System time signals, Radio Sci., 27(5), 545–551, doi:10.1029/92RS01010.(
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 16 APR 1992
- Manuscript Received: 8 JAN 1991
The accuracy of time comparison by means of the reception of common time signals, namely, LORAN-C and Global Positioning System (GPS), is examined. Differences of UTC from the emission times of these two radio wave signals measured at four Japanese stations and one U.S. station are analyzed and compared with the clock comparison reports published by the Bureau International des Poids et Mesures. The accuracy of the time comparison via LORAN-C signals of the northwest Pacific chain is about 3.61 μs and that via GPS is 0.14 μs. The accuracy analysis reveals the existence of systematic errors at the individual stations. In LORAN-C, the most serious error comes from those in the delay time calibration of receiving instruments and estimation of the propagation delay over land. Calibration of the clocks by a portable clock improves the accuracy of the GPS method to the accuracy of the GPS signals.