USE OF LIBERIA OMEGA TRANSMISSIONS FOR FREQUENCY CALIBRATION IN EGYPT

Safaa Samuel

Abstract:	The National Institute for Standards (NIS), is maintaining the Egyptian National Standards. Frequency comparisons with different transmissions has been going on for several years. In this paper, the measuring method used for frequency comparison by means of Omega transmission system between Liberia (12 kHz) and the NIS is described. The results of continuous phase comparison of the transmission from Monrovia, Liberia and the BP Cesium frequency standard maintained at NIS, a distance of 5100 km during a 10 north period (Jan-Oct, 1985) are summarized. Measurements are made on the phase records at 24 hours intervals at times when the propagation path is completely sunlit and phase fluctuations are minimal. A statistical analysis of the propagational phase variations for a 55 day sample is included. A precision of 1.6 pp 1013 is achieved in that period.
Published in:	Proceedings of the 18th Annual Precise Time and Time Interval Systems and Applications Meeting December 2 - 4, 1986 DuPont Plaza Hotel Washington, DC
Pages:	203 - 226
Cite this article:	Samuel, Safaa, "USE OF LIBERIA OMEGA TRANSMISSIONS FOR FREQUENCY CALIBRATION IN EGYPT," Proceedings of the 18th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1986, pp. 203-226.
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