@article{TUW-121252, author = {Hobiger, Thomas and Ichikawa, Ryuichi and Takasu, Tomoji and Koyama, Yasuhiro and Kondo, Tetsuro}, title = {Ray-traced troposphere slant delays for precise point positioning}, journal = {Earth Planets and Space}, year = {2008}, volume = {Vol. 60}, number = {No. 5}, pages = {1--4} }