A comparison of range and range-rate based GRACE gravity field solutions


A comparison of range and range-rate based GRACE gravity field solutions

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dc.contributor.advisor Tapley, Byron D.
dc.contributor.advisor Poole, Steven Ross, 1954-
dc.creator Pasupathy, Muthukumar
dc.date.accessioned 2011-07-13T18:04:57Z
dc.date.available 2011-07-13T18:04:57Z
dc.date.created 2011-05
dc.date.issued 2011-07-13
dc.date.submitted May 2011
dc.identifier.uri http://hdl.handle.net/2152/ETD-UT-2011-05-2818
dc.description.abstract In 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 the range-based solutions are feasible. Different subarc lengths and parameterizations were considered. Although, the most effective combination of subarc lengths and parameterizations are not picked, it is concluded that estimating the mixed periodic term along with bias, bias-rate, bias-acceleration and periodic terms degrades the quality of the range based solution and therefore should not be used. Further study is necessary to pick the optimal combination of subarc length and parameterization which would be used in the time-series analysis.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subject GRACE mission
dc.subject Range-Rate
dc.subject Gravitational fields
dc.subject Orbital mechanics
dc.subject Earth gravity
dc.title A comparison of range and range-rate based GRACE gravity field solutions
dc.date.updated 2011-07-13T18:05:08Z
dc.identifier.slug 2152/ETD-UT-2011-05-2818
dc.description.department Aerospace Engineering
dc.type.genre thesis
dc.type.material text
thesis.degree.department Aerospace Engineering
thesis.degree.discipline Aerospace Engineering
thesis.degree.grantor University of Texas at Austin
thesis.degree.level Masters
thesis.degree.name Master of Science in Engineering

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