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dc.contributor.authorClaessens, Sten
dc.contributor.authorFilmer, Mick
dc.date.accessioned2021-12-16T01:16:48Z
dc.date.available2021-12-16T01:16:48Z
dc.date.issued2020
dc.identifier.citationClaessens, S.J. and Filmer, M.S. 2020. Towards an International Height Reference System: insights from the Colorado geoid experiment using AUSGeoid computation methods. Journal of Geodesy. 94 (5): Article No. 52.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/86956
dc.identifier.doi10.1007/s00190-020-01379-3
dc.description.abstract

We apply the AUSGeoid data processing and computation methodologies to data provided for the International Height Reference System (IHRS) Colorado experiment as part of the International Association of Geodesy Joint Working Groups 0.1.2 and 2.2.2. This experiment is undertaken to test a range of different geoid computation methods from international research groups with a view to standardising these methods to form a set of conventions that can be established as an IHRS. The IHRS can realise an International Height Reference Frame to be used to study physical changes on and within the Earth. The Colorado experiment study site is much more mountainous (maximum height 4401 m) than the mostly flat Australian continent (maximum height 2228 m), and the available data over Colorado are different from Australian data (e.g. much more extensive airborne gravity coverage). Hence, we have tested and applied several modifications to the AUSGeoid approach, which had been tailored to the Australian situation. This includes different methods for the computation of terrain corrections, the gridding of terrestrial gravity data, the treatment of long-wavelength errors in the gravity anomaly grid and the combination of terrestrial and airborne data. A new method that has not previously been tested is the application of a spherical harmonic high-pass filter to residual anomalies. The results indicate that the AUSGeoid methods can successfully be used to compute a high accuracy geoid in challenging mountainous conditions. Modifications to the AUSGeoid approach lead to root-mean-square differences between geoid models up to ~ 0.028 m and agreement with GNSS-levelling data to ~ 0.044 m, but the benefits of these modifications cannot be rigorously assessed due to the limitation of the GNSS-levelling accuracy over the computation area.

dc.languageEnglish
dc.publisherSPRINGER
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectTechnology
dc.subjectGeochemistry & Geophysics
dc.subjectRemote Sensing
dc.subjectGeoid
dc.subjectQuasigeoid
dc.subjectStokes
dc.subjectGNSS-levelling
dc.subjectOrthometric heights
dc.subjectGRAVIMETRIC QUASIGEOID MODEL
dc.subject3 STOCHASTIC MODIFICATIONS
dc.subjectSTOKESS FORMULA
dc.subjectAIRBORNE
dc.subjectKERNEL
dc.subjectERROR
dc.subjectUNCERTAINTY
dc.subjectCOMBINATION
dc.subjectSATELLITE
dc.subjectACCURACY
dc.titleTowards an International Height Reference System: insights from the Colorado geoid experiment using AUSGeoid computation methods
dc.typeJournal Article
dcterms.source.volume94
dcterms.source.number5
dcterms.source.issn0949-7714
dcterms.source.titleJournal of Geodesy
dc.date.updated2021-12-16T01:16:47Z
curtin.note

This is a post-peer-review, pre-copyedit version of an article published in Journal of Geodesy. The final authenticated version is available online at: http://doi.org/10.1007/s00190-020-01379-3.

curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidClaessens, Sten [0000-0003-4935-6916]
curtin.contributor.orcidFilmer, Mick [0000-0002-3555-4869]
curtin.contributor.researcheridClaessens, Sten [H-7153-2012]
curtin.identifier.article-numberARTN 52
dcterms.source.eissn1432-1394
curtin.contributor.scopusauthoridClaessens, Sten [8717466000]
curtin.contributor.scopusauthoridFilmer, Mick [29467493800]


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