Two-Way Satellite Time Transfer (TWSTT): USNO Operations and Calibration Services

J. DeYoung

Abstract:	The U.S. Naval Observatory maintains a large number of dedicated antennas, modems, and related hardware worldwide in support of high-precision DoD and non-DoD TWSTT time ad frequency transfer users. This paper will present a small portion of our operations as an example. Recent TWSTT measured time and frequency comparison results, how we monitor the transmit and receive paths) some recent work done on evaluation of X-band high-power-amplifiers and effects on TWSTT, basics of calibration of high-precision time and frequency systems using TWSTT, and an estimate (-1.1 ns) for a recent co-located Ku-band TWSTT calibration are given.
Published in:	Proceedings of the 30th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1998 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	315 - 328
Cite this article:	DeYoung, J., "Two-Way Satellite Time Transfer (TWSTT): USNO Operations and Calibration Services," Proceedings of the 30th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, December 1998, pp. 315-328.
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