title: Lunar gravity analysis from long-term effects.
abstract: The global lunar gravity field was determined from a weighted least squares analysis of the averaged classical element of the five Lunar Orbiters.The observed-minus-computed residuals have been reduced by a factor of 10 from a previously derived gravity field.The values of the second-degree zonal and sectorial harmonics are compatible with those derived from libration data.
authors.forename: A S
authors.initials: AS
authors.lastname: Liu
authors.forename: P A
authors.initials: PA
authors.lastname: Laing