@Article{acpd-7-3179-2007, AUTHOR = {Eresmaa, R. and Järvinen, H. and Niemelä, S. and Salonen, K.}, TITLE = {Azimuthal asymmetry in ground-based GPS slant delay observations and their NWP model counterparts}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {7}, YEAR = {2007}, NUMBER = {1}, PAGES = {3179--3202}, URL = {http://www.atmos-chem-phys-discuss.net/7/3179/2007/}, ISSN = {1680-7367} }