Sub-nanosecond Timing Sync Using RTK Receivers

J. Fischer, P. Myers

Abstract:	Given that Real Time Kinetic GNSS receivers are able to track position to the centimeter level, extracting the precise time from these receivers to the equivalent level (30 pS = 1 cm) should be possible. This paper explores an approach to achieving this level of accuracy via a two-step process: 1. Solve the RTK solution for position using the standard double differencing approach 2. Return to the single difference equation, substituting the known range values and integer ambiguities values determined in step 1. What is left is the receiver’s clock bias, which is the parameter we wish to track. Once the receiver’s apparent clock bias is known, a servo loop is constructed to adjust the receiver’s local oscillator until this clock bias is zero.
Published in:	Proceedings of the ION 2013 Pacific PNT Meeting April 23 - 25, 2013 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	584 - 587
Cite this article:	Fischer, J., Myers, P., "Sub-nanosecond Timing Sync Using RTK Receivers," Proceedings of the ION 2013 Pacific PNT Meeting, Honolulu, Hawaii, April 2013, pp. 584-587.
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