Naslov
Analysis of satellite based global gravity field models on gnss/levelling and reference gravity stations worldwide

Autori
Varga, Matej ; Vidić, Ivana ; Bašić, Tomislav

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

Izvornik
17th International Multidisciplinary Scientific Geoconference SGEM 2017, Issue 22, Volume 17 / - Sofija : Stef92 Technology, 2017, 99-106

ISBN
978-619-7408-02-7

Skup
17th International Multidisciplinary Scientific Geoconference SGEM 2017

Mjesto i datum
Sofija, Bugarska, 29.06.2017. - 05.07.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
global geopotential model, GNSS/levelling, gravimetry, validation

Sažetak
Satellite based global gravity field models represent Earth’s long-wavelength static or time-variable gravity field. Their progress and development in the recent years has been induced by successful satellite missions, such as GOCE, GRACE and CHAMP and this will continue in the future missions. Resolution and agreement with quality terrestrial data are two attributes that indicate potential usability of each model. Maximum degree of spherical harmonics determines resolution of the satellite-based models. Agreement with terrestrial data is evaluated by comparing different gravity functionals calculated from model with available terrestrial reference data. Thus, spatial and spectral analysis of the quality of satellite based global geopotential models is valuable from several aspects for both creators and users of models. In this paper, gravity acceleration and geoid undulation computed from the most recent GOCE, GRACE and CHAMP global gravity field models are analysed and compared with control dataset that includes available GNSS/levelling and gravity data worldwide. GNSS/levelling and gravity data are collected, preprocessed and prepared for analysis. Results of comparison show agreement of the global gravity field models with control dataset and indicate spatial and spectral quality in the long-wavelengths of the global gravity field models.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Geodezija

POVEZANOST RADA