Journal of Geodesy

, Volume 85, Issue 7, pp 415–423 | Cite as

Universal time from VLBI single-baseline observations during CONT08

Original Article

Abstract

The IVS Intensive sessions are single-baseline, 1-h VLBI sessions carried out everyday in order to determine Universal Time (UT1). We investigate different possibilities to improve the results of such sessions. We do this investigation by extracting 2-h single-baseline sessions from the CONT08 data set. These are analysed like normal Intensives, and the results are compared to the results of the analysis of the full CONT08 data set. We find that tropospheric asymmetry is the major error source for the single-baseline sessions. It is possible to improve the accuracy of the estimated UT1 either by using accurate a priori tropospheric gradients or by estimating gradients in the data analysis.

Keywords

VLBI Universal Time Earth rotation Tropospheric gradients 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Institute of Geodesy and GeophysicsVienna University of TechnologyViennaAustria

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