Comparison of Current Gravity Estimation and Determination Models

dc.contributor.advisorBettadpur, Srinivas
dc.creatorHillman, Kyle
dc.date.accessioned2018-05-07T16:09:49Z
dc.date.available2018-05-07T16:09:49Z
dc.date.issued2018-05
dc.description.abstractThis paper will discuss the history of gravity estimation and determination models while analyzing methods that are in development. Some fundamental methods for calculating the gravity field include spherical harmonics solutions, local weighted interpolation, and global point mascon modeling (PMC). Recently, high accuracy measurements have become more accessible, and the requirements for high order geopotential modeling have become more stringent. Interest in irregular bodies, accurate models of the hydrological system, and on-board processing has demanded a comprehensive model that can quickly and accurately compute the geopotential with low memory costs. This trade study of current geopotential modeling techniques will reveal that each modeling technique has a unique use case. It is notable that the spherical harmonics model is relatively accurate but poses a cumbersome inversion problem. PMC and interpolation models, on the other hand, are computationally efficient, but require more research to become robust models with high levels of accuracy. Considerations of the trade study will suggest further research for the point mascon model. The PMC model should be improved through mascon refinement, direct solutions that stem from geodetic measurements, and further validation of the gravity gradient. Finally, the potential for each model to be implemented with parallel computation will be shown to lead to large improvements in computing time while reducing the memory cost for each technique.en_US
dc.description.departmentAerospace Engineeringen_US
dc.identifierdoi:10.15781/T2QJ78G0B
dc.identifier.urihttp://hdl.handle.net/2152/65099
dc.language.isoengen_US
dc.relation.ispartofHonors Thesesen_US
dc.rights.restrictionOpenen_US
dc.subjectPlan II Honors Thesis
dc.subjectEngineering Honors Thesisen_US
dc.subjectmasconsen_US
dc.subjectgravity estimationen_US
dc.subjectgravity determinationen_US
dc.subjectgeoiden_US
dc.subjectgeopotentialen_US
dc.subjectgravity fielden_US
dc.subjecttrajectoryen_US
dc.subjectpropagationen_US
dc.subjectparallel computationen_US
dc.subjectintegrationen_US
dc.subjectspherical harmonicsen_US
dc.subjectcubed sphere modelen_US
dc.subjectfetchen_US
dc.subjectfinite element techniquesen_US
dc.subjectGlobal PMCen_US
dc.subjectoptical modelingen_US
dc.subjectpolyhedral modelingen_US
dc.subjectorthogonal functionsen_US
dc.titleComparison of Current Gravity Estimation and Determination Modelsen_US
dc.typeThesisen_US

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