@article{TUW-119978, author = {Heinkelmann, Robert and B{\"o}hm, Johannes and Schuh, Harald}, title = {Combination of tropospheric parameters within IVS project TROPO}, journal = {EVGA Working Meetings}, year = {2005}, volume = {No. 17}, number = {Noto, Italy, April 22-23}, pages = {79--83} }