TY  - CPAPER
AU  - S. Todorova
AU  - T. Hobiger
AU  - R. Weber
AU  - H. Schuh
TI  - USING GPS FOR DETERMINATION OF THE IONOSPHERE
T2  - 5th International Scientific Conference - SGEM2005
PY  - 2005
SP  - 605
EP  - 614
PB  - SGEM Scientific GeoConference
ER  -