1. Mathematical Institute Faculty of Mathematics and Physics Charles University Prague Czech Republic
2. Department of Geophysics Faculty of Mathematics and Physics Charles University Prague Czech Republic
3. Department of Geophysics Stanford University CA Stanford USA
4. Department of Electrical Engineering Stanford University CA Stanford USA
5. Institute for Geophysics Jackson School of Geosciences University of Texas at Austin TX Austin USA
6. Jet Propulsion Laboratory California Institute of Technology CA Pasadena USA