@article{TUW-120857, author = {Dow, J.M. and Neilan, Ruth E. and Weber, Robert and Gendt, G.}, title = {Galileo and the IGS: Taking advantage of Multiple GNSS Constellations}, journal = {Advances in Space Research}, year = {2007}, volume = {Volume 39}, number = {Issue 10}, pages = {1545--1551} }