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Lunar gravity analysis from long-term effects.

A S Liu, P A Laing

    Science (New York, N.Y.)
    |September 10, 1971
    PubMed
    Summary
    This summary is machine-generated.

    Scientists mapped the Moon's gravity field using data from five Lunar Orbiters. This new lunar gravity map shows a tenfold reduction in errors compared to previous models.

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    Area of Science:

    • Lunar Science
    • Geophysics
    • Orbital Mechanics

    Background:

    • Understanding the Moon's gravity field is crucial for lunar exploration and understanding its internal structure.
    • Previous models of the lunar gravity field had limitations in accuracy and resolution.

    Purpose of the Study:

    • To determine a more accurate global lunar gravity field.
    • To improve upon existing lunar gravity models by reducing observational errors.

    Main Methods:

    • Weighted least squares analysis of averaged classical orbital elements from five Lunar Orbiters.
    • Comparison of observed-minus-computed residuals with previous gravity field models.

    Main Results:

    • A significant reduction in observed-minus-computed residuals by a factor of 10.

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  • The derived second-degree zonal and sectorial harmonics are consistent with libration data.

    • Conclusions:

    • The new gravity field model offers a substantial improvement in accuracy.
    • The findings validate the model's consistency with independent lunar data sources.