@unpublished{TUW-213358, author = {Hobiger, Thomas and B{\"o}hm, Johannes and Ichikawa, Ryuichi}, title = {Troposphere delay modeling - status quo and future trends}, year = {2012}, note = {invited; talk: American Geophysical Union (AGU) Fall Meeting 2012, San Francisco, CA, USA; 2012-12-03 -- 2012-12-07} }