@misc{johnsen_gps_atmosphere_2003, 
author={Johnsen, K.-P.},
title={GPS Atmosphere Sounding Project - An Innovative Approach for the Recovery of Atmospheric Parameters -WP 232 - Validation of Regional Models - BALTEX - and Contributions to WP 341 and WP 344},
year={2003},
howpublished = {GKSS report},
note = {Johnsen, K.: GPS Atmosphere Sounding Project - An Innovative Approach for the Recovery of Atmospheric Parameters -WP 232 - Validation of Regional Models - BALTEX - and Contributions to WP 341 and WP 344. GKSS 2003-34. 2003.}}