VLBI time-transfer using CONT08 data
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2010

One important prerequisite for geodetic Very Long Baseline Interferometry (VLBI) is the use of frequency standards with excellent short term stability, i.e. hydrogen masers. This makes VLBI stations, which are often co-located with Global Navigation Satellite System (GNSS) receiving stations, interesting for studies of time- and frequency-transfer techniques. In this paper we present an assessment of VLBI time-transfer based on the data of the two week long consecutive IVS Cont08 VLBI-campaign by using GPS Carrier Phase (GPSCP). Cont08 was a 15 days long campaign in August 2008 that involved eleven VLBI stations on five continents. For Cont08 we estimated the worst case VLBI time link stability between the station clocks of ONSALA and WETTZELL to about 1.5e-15 at one day. Comparisons with clock differences estimated with GPSCP confirm the VLBI results. The paper also indicates time-transfer related problems of the VLBI technique as used today. © 2010 IEEE.





Carsten Rieck

Onsala Space Observatory

SP Technical Research Institute of Sweden

Rüdiger Haas

Chalmers, Rymd- och geovetenskap, Rymdgeodesi och geodynamik

R. T. Kenneth Jaldehag

SP Technical Research Institute of Sweden

Jan Johansson

Chalmers, Rymd- och geovetenskap, Rymdgeodesi och geodynamik

Proceedings of the 24th European Frequency and Time Forum ESA/ESTEC Noordwijk (NL) 13-16 April 2010



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