Institution: | Department of Geodesy and Geomatics Engineering, University of New Brunswick, PO Box 4400,;Fredericton, NB, Canada, E3B 5A3. E-mail: Department of Infrastructure, The Royal Institute of Technology, SE-100 44,;Stockholm, Sweden Department of Geophysics, Faculty of Mathematics and Physics, Charles University, V Hole?ovi?kach 2,;Praha 8, Czech Republic Western Australian Centre for Geodesy, Curtin University of Technology, GPO Box U1987,;Perth WA 6845, Australia. E-mail: |