Geodetski list, Vol. 57 (80) No. 2, 2003.
Izvorni znanstveni članak
Global Geopotential Models on the Territory of Croatia
Željko Hećimović
; Hrvatski geodetski institut, Zagreb, Hrvatska
Tomislav Bašić
; Geodetski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
In this work results of the numerical investigations with 14 global geopotential models are presented with the goal to find the model that best fits the Earth gravity field on the territory of Croatia. As reference values, GPS/leveling geoid undulations were used. It was found out that global geopotential models EGM96 and GFZ97 fit best the Earth gravity field on our territory. In order to determine the existence of constant vertical shift between the Croatian vertical datum and EGM96 and GFZ97, two transformation models were defined. The transformation model which includes zero-undulation N0 fits better the real data and improves the existence of constant vertical displacement between GPS/leveling undulations and EGM96 and GFZ97 geoid of –1.37 m and –1.28 m respectively.
Ključne riječi
global geopotential models; geoid surface; vertical datum; mean sea level; GPS/leveling geoid undulations
Hrčak ID:
290308
URI
Datum izdavanja:
30.6.2003.
Posjeta: 547 *