000006649 001__ 6649
000006649 005__ 20240124160342.0
000006649 037__ $$aPOSTER-2024-0010
000006649 100__ $$aGoli, Marta
000006649 245__ $$aSimulations In Support Of Mars Polar Motion Estimation Using Radio Data From Multiple Landers
000006649 260__ $$c2023
000006649 269__ $$c2023-12-12
000006649 520__ $$aThe polar motion of Mars is defined as the movement of the rotation axis with respect to a fixed frame tied to the crust. Composed of annual, seasonal and free wobble periods, it provides information on the atmospheric dynamics and seasonal mass exchanges, as well as on the interior structure, making it an attractive study target for investigations using radiometric data. We investigate the uncertainties associated with Mars pole motion (PM) parameters estimation using Doppler, Range and Same-Beam Interferometry (SBI) observables between multiple landers on the surface of Mars and the Deep Space Network (DSN) on Earth. We use the MONTE astrodynamics and measurement simulation suite from JPL to evaluate the improvement enabled by combining data from multiple landers, identify the optimal mission architectures for PM estimation, and analyze them by considering the influence of respective mission parameters on the estimation uncertainty. In particular, we consider the effects of absolute and relative locations of the landers, observation scheduling considerations, and noise level. We re-evaluate the possibility of estimating the polar motion using data from landers in proximity to the equator, and apply our considerations to existing past, present and future missions such as InSight or the planned Mars Sample Return lander. We also consider the possible improvement in the estimation of the period of the pole’s free Chandler Wobble, which has recently been detected for the first time using orbiter radio tracking (Konopliv et al 2020).
000006649 594__ $$aNO
000006649 6531_ $$aMars
000006649 6531_ $$aRadio science
000006649 6531_ $$aPolar motion
000006649 6531_ $$aSimulations
000006649 700__ $$aLe Maistre, Sébastien
000006649 700__ $$aYseboodt, Marie
000006649 700__ $$aCaldiero, Alfonso
000006649 700__ $$aDehant, Véronique
000006649 773__ $$tAmerican Geophysical Union Fall Meeting 2023
000006649 8560_ $$fmarta.goli@ksb-orb.be
000006649 85642 $$ahttps://agu.confex.com/agu/fm23/meetingapp.cgi/Paper/1391651
000006649 980__ $$aCPOSTER