Naslov
Analysis of Recent Global Geopotential Models Over the Croatian Territory

Autori
Liker, Mihajla ; Lučić, Maro ; Barišić, Bojan ; Repanić, Marija ; Grgić, Ilija ; Bašić, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Gravity, Geoid and Earth Observation : IAG Commission 2: Gravity Field, International Association of Geodesy Symposia, 135 / Mertikas, Stelios P. - Berlin : Heidelberg : Springer, 2010, 283-288

ISBN
978-3-642-10634-7

Skup
IAG International Symposium "Gravity, Geoid and Earth Observation"

Mjesto i datum
Chania, Grčka, 23.-27.06.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Croatian geoid model HRG2000 ; national vertical systems TRIESTE and HVRS71 ; global geopotential models ; EGM2008 geoid modelling ; national vertical systems

Sažetak
Independent quality control of the national geoid model HRG2000 was performed using 65 control points, obtained through the realization of EUVN and EUVN_DA projects and the Croatian fundamental gravity network. Ellipsoidal heights and positions of the control points are precisely determined by GNSS measurements while the geodetic heights are obtained by geometric levelling. The latest geoid model HRG2000 is related to the old vertical system. The analysis indicated the need for a new improved national geoid model which has to be connected to the new vertical system HVRS71. As preparation, and as first step, an analysis of the global geopotential models was made, using eleven recent CHAMP and/or GRACE global models. The statistics of the differences between GNSS/levelling height anomalies (ζHVRS71) and corresponding anomalies obtained from global geopotential models (ζMODEL) shows that EGM2008 model is most suitable at this moment. Another interesting fact is that all global models are approximately 93 cm above the new Croatian vertical datum.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija

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