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ACKNOWLEDGEMENTS 
The Belgian Science Policy Office is gratefully acknowledged 
for funding the work presented in this paper (SR/00/105). The 
authors also wish to thank the other partners of the MAMUD 
project. Dr. G. Buyuksalih of IMP-Bimtas and Prof. Dr. M. 
Crespi, Francesca Fratarcangelli and Francesca Pieralice of 
DITS - Area di Geodesia e Geomatica, Sapienza University 
Of Rome.