Combination of Two Radio Space-Geodetic Techniques with VieVS during CONT14
Other conference contribution, 2016

Unlike CONT11, CONT14 does not have official information on common frequency standards for co-located sites. Nevertheless, according to Kwak et al. (2015) [1], we have a possibility to find the co-located sites, which used the same clocks, through comparing clock rates from single technique solutions. Moreover, CONT14 includes co-located VLBI radio telescopes, i.e. HOBART26 and HOBART12. Therefore, it is also a good test bed to develop the analysis strategy for future twin/sibling telescopes. In this study, we compute VLBI-like GNSS delays (GNSS single differences) between the ranges from two stations to a satellite, using phase measurements with most of the errors corrected by the c5++ software. We estimate station coordinates and site common parameters, i.e. zenith wet delays, troposphere gradients and clock parameters, with the Vienna VLBI Software. Common clock parameters are limited to the sites sharing the same frequency standard and having good performance of it during CONT14. Local tie vectors are introduced as fictitious observations for co-located instruments, GNSS-VLBI and even VLBI-VLBI, i.e. at Hobart. In this paper, we show the comparison results between the combination solutions and the single technique solutions in terms of station position repeatability during 15 days.


Younghee Kwak

Johannes Böhm

Thomas Hobiger

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Chalmers, Earth and Space Sciences, Space Geodesy and Geodynamics

Lucia Plank

Kamil Teke

IVS 2016 General Meeting Proceedings "New Horizons with VGOS"

NASA/CP-2016-219016 265-269

Subject Categories

Other Earth and Related Environmental Sciences


Geosciences, Multidisciplinary


Basic sciences


Onsala Space Observatory

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