@unpublished{TUW-120973, author = {Todorova, Sonya and Schuh, Harald}, title = {Integration of Global Navigation Satellite System (GNSS) and satellite altimetry measurements towards combines Global Ionosphere Maps}, year = {2007}, note = {poster presentation: IRI/COST 296 Workshop, Prag, Tschechische Republik; 2007-07-10 -- 2007-07-14} }