@unpublished{TUW-213357, author = {B{\"o}hm, Johannes and Lagler, Klemens and Schindelegger, Michael and Krasna, Hana and Nilsson, Tobias}, title = {GPT2/GMF2: an improved empirical model for troposphere delays}, year = {2012}, note = {talk: American Geophysical Union (AGU) Fall Meeting 2012, San Francisco, CA, USA; 2012-12-03 -- 2012-12-07} }