Spread Spectrum Time Transfer Experiment Via Intelsat

P. Hartl, L. Veenstra, N. Gieschen, K.M. Mussencr, W. Schafer, C.M. Wende, W. Klepczynski, H.H. Nau, H. Stoiber

Abstract:	A two-way time synchronization experiment was performed in July 1983, between) Washington D.C. and Oberfaffenhofen, Federal Republic of Germany. The experiment used the 14/11-Ghz transponders on the INTELSAT Atlantic spacecraft. The MITREX (Microwave Time and Ranging Experiment ) modem designed, developed, and constructed at the Technical University of Berlin was employed. The experiment was jointly conducted by COMSAT Laboratories and the Institute for Nachritentechnik, DFVLR, Oberpffafenhofen, FRG, in cooperation with the United States Naval Observatory and the Institut fur Luft und Raumfahrt, TU Berlin. The spread spectrum signal occupied a bandwidth of 4 MHz and used the power normally required by a single-voice carrier. The ground stations involved had parabolic dishes of 2.4 m (G/T = 20 dB/K) and 4.5 m (G/T = 26 dB/K) . In the 4-MHz occupied bandwidth, the carrier-to-noise ratio was -11 dB. At: this power level, the time transfer performance had rms-standard deviations of better than 1ns.
Published in:	Proceedings of the 15th Annual Precise Time and Time Interval Systems and Applications Meeting December 6 - 8, 1983 Naval Research Laboratory Washington, DC
Pages:	331 - 356
Cite this article:	Hartl, P., Veenstra, L., Gieschen, N., Mussencr, K.M., Schafer, W., Wende, C.M., Klepczynski, W., Nau, H.H., Stoiber, H., "Spread Spectrum Time Transfer Experiment Via Intelsat," Proceedings of the 15th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1983, pp. 331-356.
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