Program: GS-2014A-Q-93

About 2000 radio quasars are observed regularly by the International VLBI Service, IVS, to define and maintain the International Celestial Reference Frame, ICRF. We have presented evidence for large scale proper motions. While the dipole effect is consistent with theoretical prediction, the quadrupole effect, at a level in excess of 10 muas/year, presents a serious challenge to the standard cosmologies. However, we have a concern that our estimates of the spherical harmonics may be influenced by the paucity of IVS quasars with known redshifts in the south. . We therefore asking for observing time on the Gemini South telescope with GMOS-S to measure redshifts of three southern radio quasar redshifts. These quasars have long observational history, strong flux, but very faint in the optical wavelengths.