= Frank G. Lemoine
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<Frank G. Lemoine> coauthored a high-resolution lunar <gravity> solution from <GRAIL> spacecraft tracking. The GRGM900C model represents the field using <spherical harmonics> and compares it with the gravity predicted from lunar <surface topography>.<GRGM900C: A degree 900 lunar gravity model from GRAIL primary and extended mission data by Frank G. Lemoine and others>[Abstract and sections 4.2–4.3: tracking solution and gravity/topography comparison]{ref}
Higher harmonic degree resolves shorter spatial scales, but useful resolution also depends on orbit geometry and measurement uncertainty. Residual gravity after topographic correction helps investigate subsurface <density> structure.
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