2.GRACE: Gravity Recovery and Climate Experiment: Science and Mission Requirements Document. Revision A[]..1998
3J.A Johannessen,,M. Aguirre-Martinez.Gravity Field and Steady Ocean Circulation Mission[].the four candidate earth explorer core missions.1999
4Hans s nkel.The gravity field mission GOCE of ESA,science and application[].Mitteilungen der geod tischen Institute der Technischen Universit t Graz Folge Graz.2001
