DFHRS-based computation of quasi-geoid of Latvia

Autor:	Ghadi Younis, Reiner Jäger, Ansis Zariņš, Inese Janpaule, Jānis Kaminskis
Jazyk:	angličtina
Rok vydání:	2013
Předmět:	QB275-343 Computation Levelling Geodesy Ellipsoid GNSS Height Determination Geography Transformation (function) Geoid/Quasi-Geoid-Computation GNSS applications Geoid Reference surface Orthometric height General Earth and Planetary Sciences Normal height
Zdroj:	Geodesy and Cartography; Vol 39 No 1 (2013); 11-17 Geodesy and Cartography, Vol 39, Iss 1 (2013)
ISSN:	2029-6991 2029-7009
Popis:	In geodesy, civil engineering and related fields high accuracy coordinate determination is needed, for that reason GNSS technologies plays important role. Transformation from GNSS derived ellipsoidal heights to orthometric or normal heights requires a high accuracy geoid or quasi-geoid model, respectively the accuracy of the currently used Latvian gravimetric quasi-geoid model LV'98 is 6–8 cm. The objective of this work was to calculate an improved quasi-geoid (QGeoid) for Latvia. The computation was performed by applying the DFHRS software. This paper discusses obtained geoid height reference surface, its comparisons to other geoid models, fitting point statistics and quality control based on independent measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4361ef5547242c01a0ed1b9b25eab947 https://journals.vilniustech.lt/index.php/GAC/article/view/4055 Zobrazit plný text záznamu