Print Email Facebook Twitter The Gravity of Titan Title The Gravity of Titan: Analysis of Cassini's Doppler Tracking Data and Solar Radiation Pressure Author van Noort, Bob (TU Delft Aerospace Engineering) Contributor van der Wal, W. (mentor) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2021-01-26 Abstract Saturn's largest natural satellite, Titan, is an icy moon expected to harbour a liquid sub-surface water ocean capable of habiting extra-terrestrial life. The spherical harmonic expansion of the gravity field and the tidal Love number k2 can be used to estimate densities, depths, and phases of different layers from Titan’s interior structure, granting insight on the sub-surface ocean and its habitability. Recent research has determined the spherical harmonic expansion of the gravity field up to degree five including the estimation of Titan’s tidal Love number k2. This work estimates the spherical harmonic gravity field of Titan up to degree three through a multi-arc batch weighted least squares approach, with fundamental differences from previous research. We include observation biases and empirical accelerations for estimation in our dynamic force model and apply no constraints on the gravity and tidal parameters for estimation. Previous research claims the applied global constraints do not constrain the solution, yet an independent estimation of the gravity and tides of Titan yields significantly different results: high correlation between global parameters results in the inability to determine a realistic k2 Love number. We refrain from applying any global constraints to the gravity and tidal parameters, as there exists no a priori information on these parameters to apply a physical and unbiased constraint. Subject CassiniTitanGravityDoppler trackingSolar Radiation Pressure To reference this document use: http://resolver.tudelft.nl/uuid:f6e6ad4c-62cc-4c29-81ad-8559adbe20bd Embargo date 2021-07-01 Part of collection Student theses Document type master thesis Rights © 2021 Bob van Noort Files PDF ThesisFinal_BobvanNoort.pdf 4.25 MB Close viewer /islandora/object/uuid:f6e6ad4c-62cc-4c29-81ad-8559adbe20bd/datastream/OBJ/view