000004588 001__ 4588
000004588 005__ 20200121161454.0
000004588 0247_ $$2DOI$$a10.1016/j.pss.2019.104745
000004588 037__ $$aSCART-2020-0028
000004588 100__ $$aPeters, M.J.
000004588 245__ $$aLaRa after RISE: Expected improvement in the Mars rotation and interior models
000004588 260__ $$c2020
000004588 520__ $$aTwo years after InSight’s arrival at Mars, the ExoMars 2020 mission will land on the opposite side of the red planet. Similarly to InSight, which carries the RISE (Rotation and Interior Structure Experiment) radio-science experiment, the ExoMars mission will have on board the Lander Radio-science (LaRa) experiment.  The Xband transponders on RISE and LaRa, allowing for direct radio-link between the landers and stations on Earth, are dedicated to the investigation of Mars’ deep interior through the precise measurement of the planet’s rotation and orientation. The benefit of having LaRa after RISE for the determination of the Mars orientation and rotation parameters is demonstrated and the resulting improved constraints on the interior structure of Mars and, in particular, on its core are quantified via numerical simulations.  In particular, we show that the amplitudes of the semi-annual prograde (p2) and the ter-annual retrograde (r3) nutations will be determined with a precision of 6 and 4 milliarcseconds respectively by combining 700 days of RISE data with 700 days of LaRa data, about 35% more precise than what is expected from RISE alone. The impact of such an improvement on the determination of the core size of Mars is discussed and shown to be significant.
000004588 536__ $$aPRODEX/$$cPRODEX/$$fPRODEX
000004588 594__ $$aNO
000004588 700__ $$aLe Maistre, S.
000004588 700__ $$aYseboodt, M.
000004588 700__ $$aMarty, J.C.
000004588 700__ $$aRivoldini, A.
000004588 700__ $$aVan Hoolst, T.
000004588 700__ $$aDehant, V.
000004588 773__ $$c104745$$pPlanetary and Space Science$$v180$$y2020
000004588 8560_ $$fmarie.yseboodt@observatoire.be
000004588 85642 $$ahttps://doi.org/10.1016/j.pss.2019.104745
000004588 85642 $$ahttps://arxiv.org/abs/1910.10588
000004588 8564_ $$s1644176$$uhttps://publi2-as.oma.be/record/4588/files/Peters20.pss180.laraafterRISE_synergy.pdf
000004588 8564_ $$s370199$$uhttps://publi2-as.oma.be/record/4588/files/Peters20.arxiv1910.10588.laraafterRISE_synergy.pdf
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000004588 905__ $$apublished in
000004588 980__ $$aREFERD