@misc{johnsen_champ__2003, 
author={Johnsen, K.-P.,Miao, J.},
title={CHAMP / GPS Water Vapor Compared with a NWP Model and with AMSU / B Data},
year={2003},
howpublished = {conference lecture: Nizza (F); 06.-11.04.2003},
note = {Online available at: \url{} (DOI). Johnsen, K.; Miao, J.: CHAMP / GPS Water Vapor Compared with a NWP Model and with AMSU / B Data. EGS-AGU-EUG Joint Assembly. Nizza (F), 2003.}}