1. 1Hufenbach,B.,etal. "ComparativeAssessmentofGaugingSystemsandDescriptionofaLiquid Level GaugingConceptfora SpinStabilizedSpacecraft",Proceedings ofthe SecondEuropean Spacecraft PropulsionConference, 27-29May1997,Noordwijk, the Netherlands.Editedby Michael Perry. ESASP-398.Paris: EuropeanSpaceAgency,1997., pp.561-570