Naslov
Comparison of Champ and GRACE geoid models with Croatian HRG2000 geoid

Autori
Hećimović, Željko ; Bašić, Tomislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Geophysical Research Abstracts, Vol. 6, 02715, 2004, ISSN: 1029-7006 / European Geosciences Union (EGU) - Nica : European Geosciences Union (EGU), 2004

Skup
European Geosciences Union 1st General Assembly

Mjesto i datum
Nica, Francuska, 25.04.2004. - 30.04.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
CHAMP; GRACE; HRG2000; geoid comparisons

Sažetak
Latest Croatian geoid solution HRG2000 and CHAMP and GRACE global geopotential geoid models EIGEN-2 (CHAMP), EIGEN-01S (GRACE), GGM01S (GRACE) and GGM01C (GRACE) are compared. Orientation and long wave structure of the HRG2000 geoid is judged using CHAMP and GRACE models, while HRG2000 is used to judge the resolution of the global CHAMP and GRACE models over the Croatian territory. Since the global EGM96 model was used for the calculation of HRG2000 solution, its long wave structures are analyzed too. Main statistical characteristics of geoid differences are showing the best agreement between HRG2000 and GGM01C (GRACE) model. Their geoid differences are oscillating between -0.3 m and 2.5 m with the fluctuation of 0.46 m around the average difference of 1.20 m. The average difference originates from the existing vertical shift between the Croatian and the global vertical datum. As the new global geopotential models like CHAMP and GRACE are representing better the long and medium wave gravity filed structures at the investigated area than the older global geopotential models, they will be certainly used for the computation of new Croatian geoid solutions in the near future.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija

POVEZANOST RADA