Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.6544f&link_type=abstract
American Astronomical Society, DPS Meeting #32, #65.44; Bulletin of the American Astronomical Society, Vol. 32, p.1648
Astronomy and Astrophysics
Astronomy
Scientific paper
The NEIGE experiment is one of nine experiments under study for inclusion in the Mars Netlander payload. The four Netlander microstations on the Mars surface will define a frame linked to the planetary crust. By monitoring the orientation of this frame with respect to inertial space, we will be able to measure the variations in the angular orientation of Mars, and then derive information about the size of the core interior of Mars and physical state of the core and mantle. NEIGE will also provide measurements of the Mars ionosphere, serving both as an investigation and as a calibration for the geodesy measurements. NEIGE data will also improve our knowledge of the gravity field of Mars. Unlike the Mars Pathfinder and Viking landers, the Netlanders will be unable to communicate directly with the Earth. Instead a Martian orbiter will be used as a data relay. Dual-frequency Doppler measurements will be made between the Netlanders and the support orbiter. The trajectory of the orbiter in inertial space will be determined by radio tracking from Earth, whose orientation with respect to inertial space is well known, in combination with the Netlander-orbiter measurements. Nominally one tracking pass per week per Netlander is required to reach the geodetic and ionosphere objectives.
Barriot Jean-Pierre
Benoist Joel
Cerisier Jean-Claude
Dehant Véronique
Folkner William M.
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