Local lunar gravity field analysis over the South Pole-Aitken basin from SELENE farside tracking data

Details Local lunar gravity field analysis over the South Pole-Aitken basin from SELENE farside tracking data Local lunar gravity field analysis over the South Pole-Aitken basin from SELENE farside tracking data

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jgre..11702005g&link_type=abstract

Journal of Geophysical Research, Volume 117, Issue E2, CiteID E02005

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Applications

Geodesy And Gravity: Lunar And Planetary Geodesy And Gravity (5417, 5450, 5714, 5744, 6019, 6250), Planetary Sciences: Solid Surface Planets: Gravitational Fields (1221), Planetary Sciences: Solid Surface Planets: Instruments And Techniques, Planetary Sciences: Comets And Small Bodies: Gravitational Fields (1221), Planetary Sciences: Solar System Objects: Moon (1221)

Scientific paper

We present a method with which we determined the local lunar gravity field model over the South Pole-Aitken (SPA) basin on the farside of the Moon by estimating adjustments to a global lunar gravity field model using SELENE tracking data. Our adjustments are expressed in localized functions concentrated over the SPA region in a spherical cap with a radius of 45° centered at (191.1°E, 53.2°S), and the resolution is equivalent to a 150th degree and order spherical harmonics expansion. The new solution over SPA was used in several applications of geophysical analysis. It shows an increased correlation with high-resolution lunar topography in the frequency band l = 40-70, and admittance values are slightly different and more leveled when compared to other, global gravity field models using the same data. The adjustments expressed in free-air anomalies and differences in Bouguer anomalies between the local solution and the a priori global solution correlate with topographic surface features. The Moho structure beneath the SPA basin is slightly modified in our solution, most notably at the southern rim of the Apollo basin and around the Zeeman crater.

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