Arras, C., Beyerle, G., Faber [Haser], A., Heise, S., Michalak, G., Schmidt, T., Semmling, M., Stosius, R., Wickert, J., Zus, F. (2010): Radio occultation at GFZ: Recent activities, GRAS-SAG Meeting, EUMETSAT (Darmstadt 2010).