Very Long Baseline Interferometry with the SKA
  Adding VLBI capability to the SKA arrays will greatly broaden the science of the SKA, and is feasible within the current specifications. SKA-VLBI can be initially implemented by providing phased-array outputs for SKA1-MID and SKA1-SUR and using these extremely sensitive stations with other radio telescopes, and in SKA2 by realising a distributed configuration providing baselines up to thousands of km, merging it with existing VLBI networks. The motivation for and the possible realization of SKA-VLBI is described in this paper. 
Zsolt Paragi, Leith Godfrey, Cormac Reynolds, Maria Rioja, Adam   Deller, Bo Zhang, Leonid Gurvits, Michael Bietenholz, Arpa...
astro-ph.IM astro-ph.CO astro-ph.GA astro-ph.HE astro-ph.SR