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| Titel |
Spectral characteristics of the Hellenic vertical network - Validation over Central and Northern Greece using GOCE/GRACE global geopotential models |
| VerfasserIn |
Vassilios D. Andritsanos, George S. Vergos, Vassilios N. Grigoriadis, Vassilios Pagounis, Ilias N. Tziavos |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087199
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| Publikation (Nr.) |
 EGU/EGU2014-1223.pdf |
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| Zusammenfassung |
| The Elevation project, funded by the action “Archimedes III – Funding of research groups in T.E.I.”, co-financed by the E.U. (European Social Fund) and national funds under the Operational Program “Education and Lifelong Learning 2007-2013” aims mainly to the validation of the Hellenic vertical datum. This validation is carried out over two areas under study, one in Central and another in Northern Greece. During the first stage of the validation process, satellite-only as well as combined satellite-terrestrial models of the Earth’s geopotential are used. GOCE and GRACE satellite information is compared against recently measured GPS/Levelling observations at specific benchmarks of the vertical network in Attiki (Central Greece) and Thessaloniki (Northern Greece). A spectral enhancement approach is followed where, given the GOCE/GRACE GGM truncation degree, EGM2008 is used to fill-in the medium and high-frequency content along with RTM effects for the high and ultra high part. The second stage is based on the localization of possible blunders of the vertical network using the spectral information derived previously. The undoubted accuracy of the contemporary global models at the low frequency band leads to some initial conclusions about the consistency of the Hellenic vertical datum. |
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