@techreport{TUW-230005, author = {Weber, Robert and Hinterberger, Fabian and Huber, Katrin and Lesjak, Roman and Thaler, Gottfried and Klug, Christian}, title = {Network based GNSS Phase Biases to enhance PPP Applications - A new Service Level of GNSS Reference Station Providers}, institution = {E120 - Department of Geodesy and Geoinformation; Vienna University of Technology}, year = {2014} }