Physics
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...31..244b&link_type=abstract
Icarus, vol. 31, June 1977, p. 244-259.
Physics
21
Gravity Anomalies, Harmonic Analysis, Lunar Maps, Lunar Topography, Selenography, Spherical Harmonics, Analysis Of Variance, Density (Mass/Volume), Lithosphere, Lunar Gravitation, Tables (Data)
Scientific paper
A global lunar topographic map has been derived from existing earth-based and orbital observations supplemented in areas without data by a linear autocovariance predictor. Of 2592 bins, each 5 deg square, 1380 (64.7% by area) contain at least one measurement. A spherical harmonic analysis to degree 12 yields a mean radius of 1737.53 plus or minus 0.03 km (formal standard error) and an offset of the center of figure of 1.98 plus or minus 0.06 km toward (19 plus or minus 2) deg S, (194 plus or minus 1) deg E. A Bouguer gravity map, derived from a 12-degree free-air gravity model and the present topography data, is presented for an elevation of 100 km above the mean surface. It is confirmed that the low-degree gravity harmonics are determined primarily by surface height variations and only secondarily by lateral density variations.
Bills Bruce G.
Ferrari Agnaldo José
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