TY  - JOUR
TI  - Comparison of Recent and Former Satellite-Based Gravity Models: A Case Study of Kansas, USA
AB  - Satellite-based gravity models have been used constantly in many different areas recently. The easyaccessibility of the data provides great advantages for difficult conditions such as mountainousareas or the ability to calculate directly for inaccessible areas such as Arctic regions. In addition,shallow studies are possible by increasing the spatial resolution over time by using new satellitesand new models obtained from these satellite data. Spatial resolution can be increased with the useof terrestrial data and thus the most representative satellite gravity model which has the lowesterror may be determined for a region. It is thought that the results obtained from the studies withthis lowest error model represent that region in the best way. Within the scope of this study,experiments were conducted for former and current satellite gravity models using terrestrialgravity data that was collected in Kansas state. Besides, comparisons were made at differentdegree/order using only GOCE satellite gravity models (long wavelengths) and combined models(short wavelengths). As 8.63 mGal lowest error between satellite models and terrestrial data wasobtained from XGM2019e_2159 and ERTM2160 combination. In the comparison between GOCEmodels, GOCE TIM R5 model gave the lowest error with a difference of 9.94 mGal. Although it isobserved that the difference between the other combined models and the results obtained from theXGM2019e_2159 model does not exceed 0.4 mGal for degree up to 2190 and these values are notconsidered as a big difference in geophysical studies, but the sensitivity of these values is muchmore important in geodetic studies.
AU  - DOĞRU, FİKRET
DO  - 10.21205/deufmd.2021236911
PY  - 2021
JO  - Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi
VL  - 23
IS  - 69
SN  - 1302-9304
SP  - 835
EP  - 844
DB  - TRDizin
UR  - http://search/yayin/detay/443381
ER  -