Common-View Time Transfer Using the Two-Channel Fast-Sequencing GPS Receiver K+K GPS6-2K

P. Hetzel, T. Polewka, W. Klische

Abstract:	Two 2-channel fast-sequencing GPS receivers (Type K+K GPS6-2K made by K+K Messtechnik GmbH, Braunschweig, Germany) have been studied in co-location and in comparison with the NBS-type receivers used at the PTB for the regular GPS CV- time transfer. The new receivers consist of two channels (the "Tracking Channel" and the "Data Channel"), a built-in time interval meter, and PC software. The "Tracking Channel" either continuously tracks a single satellite or sequentially tracks all satellites in view. Both the code phase and the carrier (delta) phase are measured and combined to yield a smoothed reading of the received satellite time. The "Data Channel" reads all the data necessary from the satellites, like almanac, ephemeris, ionospheric model parameters, etc, and acquires new satellites as they arise above the horizon. The PC software currently used generates the "CGGTTS GPS/GLONASS Data Format" in either multi-channel mode when observing all satellites in view, or in the traditional single channel mode when tracking a single satellite according to the limited BIPM schedule. The receiver architecture is described, and measurement results obtained from the K+K receivers are compared with the corresponding results determined by NBS-type receivers.
Published in:	Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting November 27 - 27, 2001 Hyatt Regency Long Beach Long Beach, California
Pages:	149 - 156
Cite this article:	Hetzel, P., Polewka, T., Klische, W., "Common-View Time Transfer Using the Two-Channel Fast-Sequencing GPS Receiver K+K GPS6-2K," Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, November 2001, pp. 149-156.
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