A comparison of range and range-rate measurements for the generation of the GRACE gravity fields

dc.contributor.advisorTapley, Byron D.
dc.creatorWallace, Mark Steven
dc.date.accessioned2021-06-03T21:56:03Z
dc.date.available2021-06-03T21:56:03Z
dc.date.issued2005-08-15
dc.description.abstractIn the generation of the standard GRACE gravity fields, the K-Band Ranging (KBR) system data is used in its range-rate mode. Because time derivatives attenuate the gravity signal relative to the data noise at the lower frequencies, it is thought that solutions using range data might have better low-degree (low-frequency) characteristics. The purpose of this work is to detail the methods required to generate range-based solutions, to determine some of the properties of these solutions, and then to compare them to range-rate-based solutions. It is demonstrated that range-based solutions are feasible, and that the most effective KBR parameterization in this analysis is to estimate the bias parameter four times per orbital revolution, the bias-rate parameter twice per revolution, and the bias-acceleration and periodic parameters once per revolution. This parameterization yields an improvement in the accuracy of the earth oblateness term, C₂₀, of almost a factor of three, compared to an independent measurement. However, this improvement comes at the expense of the accuracy of the higher-degree gravity coefficientsen_US
dc.description.departmentAerospace Engineeringen_US
dc.format.mediumelectronicen_US
dc.identifier.urihttps://hdl.handle.net/2152/86298
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/13249
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en_US
dc.rights.restrictionOpenen_US
dc.subjectGRACE gravity fieldsen_US
dc.subjectRange-rate dataen_US
dc.subjectK-band rangingen_US
dc.titleA comparison of range and range-rate measurements for the generation of the GRACE gravity fieldsen_US
dc.typeThesisen_US
dc.type.genreThesisen_US
thesis.degree.departmentAerospace Engineeringen_US
thesis.degree.disciplineAerospace Engineeringen_US
thesis.degree.grantorUniversity of Texas at Austinen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science in Engineeringen_US

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