Fig. 6

Baseline length repeatabilities. a Baseline length repeatabilities for about 2700 VLBI sessions between 1993 and 2014 and different solution setups including a reference solution (black crosses), a simple solution with a constant additional noise term (purple triangles), the Gipson et al. (2008) approach (green circles) and the turbulence-based solution (brown stars). For each solution, an exponential trend is fitted to the data (solid lines). b Baseline length repeatabilities of a as differences with respect to the reference solution