@unpublished{TUW-167272, author = {Alizadeh, Mahdi and Todorova, Sonya and Schuh, Harald and Schmidt, Michael}, title = {Towards 4D Ionosphere model Combining GNSS and Satellite altimetry with FORMOSAT-3/COSMIC}, year = {2008}, note = {talk: Geod{\"a}tische Woche 2008, Bremen; 2008-09-30 -- 2008-10-02} }