@unpublished{TUW-252045, author = {M{\"o}ller, Gregor and Wittmann, C. and Yan, Xin and Weber, Robert}, title = {GNSS tomography and the impact of refractivity data assimilation on precipitation forecas}, year = {2016}, note = {talk: IAG Commission 4 Symposium, Wroclaw, Polen; 2016-09-04 -- 2016-09-07} }