%0 Journal Article %A O. N. Bogdanov %T Refinement of trajectory parameters for GPS and GLONASS navigation satellites using IGS position data %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2009 %P 53-56 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2009_3_a9/ %G ru %F VMUMM_2009_3_a9