Evaluation of EGM08 based on GPS and orthometric heights                            
over the hellenic mainland

dc.contributor.author	Κωτσάκης, Χριστόφορος	el
dc.contributor.author	Κατσάμπαλος, Κωνσταντίνος	el
dc.contributor.author	Γιαννίου, Μιχαήλ	el
dc.date.accessioned	2015-05-21T21:02:27Z
dc.date.issued	2015-05-22
dc.identifier.uri	http://hdl.handle.net/11400/10865
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://bgi.omp.obs-mip.fr	en
dc.subject	Global Positioning System
dc.subject	Earth Gravitational Model
dc.subject	Greece
dc.subject	Ηπειρωτική χώρα
dc.subject	Ελλάδα
dc.title	Evaluation of EGM08 based on GPS and orthometric heights over the hellenic mainland	el
heal.type	journalArticle
heal.classification	Topography
heal.classification	Geodesy
heal.classification	Τοποθεσία
heal.classification	Γεωδαισία
heal.classificationURI	http://skos.um.es/unescothes/C04078
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85053969
heal.classificationURI	N/A-Τοποθεσία
heal.classificationURI	N/A-Γεωδαισία
heal.dateAvailable	10000-01-01
heal.language	en
heal.access	forever
heal.publicationDate	2009-04
heal.bibliographicCitation	Kotsakis, C., Katsambalos, K. and Gianniou, M. (2008) Evaluation of EGM08 based on GPS and orthometric heights over the hellenic mainland. "Newton's Bulletin", 4, p.144-163	en
heal.abstract	This report presents the evaluation results for the new Earth Gravitational Model (EGM08) that was recently released by theUS National Geospatial-Intelligence Agency, using GPS and leveled orthometric heights in the area of Greece. Detailed comparisons of geoidundu-lations obtained from the EGM08 model and other combined global geopotential models (GGMs) with GPS/leveling data have been performed in both absoluteand relative sense. The test network covers the entire part of the Hellenic mainland and it consists ofmore than 1500 benchmarks which belong to the Hellenic national triangulation network, with direct leveling tiesto the Hellenic vertical reference frame. The spatial positions ofthese bench-marks have been recently determined at cm-level accuracy (with respect to ITRF2000) during a nation-wide GPS campaign that was organized in the frame of the HEPOS project. Our results reveal that EGM08 offers a major improvement (more than 60%) for the agreement among geoidal, ellipsoidal and orthometric heights over the mainland part of Greece, compared to the performance of other combined GGMs for the same area.	en
heal.publisher	BGI	en
heal.journalName	Newton's Bulletin	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true