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Gravity field and rotation state of Mercury from the BepiColombo Radio Science Experiments by A Milani; A Rossi; D Vokrouhlický; D Villani; C Bonanno is a Physics and Astronomy article available to read on EtoBox.

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The ESA mission BepiColombo will include a Mercury Planetary Orbiter equipped with a full complement of instruments to perform Radio Science Experiments. Very precise range and range-rate tracking from Earth, on-board accelerometry, altimetry and accurate angular measurements with optical instruments will provide large data sets. From these it will be possible to study (1) the global gravity ÿeld of Mercury and its temporal variations due to tides, (2) the medium to short scale (down do 300 400 km) gravity anomalies, (3) the rotation state of the planet, in particular the obliquity and the libration with respect to the 3=2 spin orbit resonance and (4) the orbit of the center of mass of the planet. With the global gravity ÿeld and the rotation state it is possible to tightly constrain the internal structure of the planet, in particular to determine whether the solid surface of the planet is decoupled from the inner core by some liquid layer, as postulated by dynamo theories of Mercury's magnetic ÿeld. With the gravity anomalies and altimetry it is possible to study the geophysics of the planet's crust, mantle and impact basins. With the orbit of the planet closest to the Sun it is p

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Author

A Milani; A Rossi; D Vokrouhlický; D Villani; C Bonanno

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-0633)

Published

2001

Language

EN

Field

Physics and Astronomy (Physical Sciences)