Scale difference between various TRF solutions

S. Kurdubov1, N. Panafidina2

1Institute of Applied Astronomy, St.Petersburg, Russia
2GFZ Potsdam, Germany

Poster

IVS Analysis Center at the Institute of Applied Astronomy, Russia, provides global VLBI solutions obtained with the software package QUASAR. It was found that our terrestrial reference frame solution differs quite significantly (about 1.3 ppb) from the ITRF2005, the reason for this behavior is not yet well understood. In this presentation we compare several different VLBI and SLR solutions in order to see a dependency of the network scale on the processing strategy and to see how the analysis options can influence solutions from two different techniques. We used VLBI TRF solutions from BKG and GSFC IVS Analysis Centers and VTRF2008, as well as several our own test solutions obtained with different reduction models and parameter estimation modes. SLR solutions for the comparison were taken from the ILRS Analysis Centers.