@Article{acpd-5-2269-2005, AUTHOR = {Sussmann, R. and Stremme, W. and Buchwitz, M. and de Beek, R.}, TITLE = {Validation of ENVISAT/SCIAMACHY columnar methane by solar FTIR spectrometry at the Ground-Truthing Station Zugspitze}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {5}, YEAR = {2005}, NUMBER = {2}, PAGES = {2269--2295}, URL = {http://www.atmos-chem-phys-discuss.net/5/2269/2005/}, ISSN = {1680-7367} }