Abstract

Using Global Gravity Models Data ismost important method for establised unified gravity data base covering holdcountry of Vietnam. For this job need determination of the GGMs with highaccuracy and better resolution of the gravity anormalies for combinated with terrectrial gravity observation on thesea of Vietnam. Gravity anormalies from Four selected GGMs: EGM2008 (n=2159),GECO (n=2190), EIGEN 6C4 (2190) and SGG-UGM-1 are using for analized andcompared with gravityanomalies derived from terrectrial gravity observation on the two site of thesea Vietnam. The Comparison and the results of analized gravity anomalies between GGMs and terrectrial gravity wasshown Global gravity model GECO is most accurated model with residual 4,3 mGalfor the northern site and 3,0 for Southern site of sea Vietnam. From theresults show that global gravity model GECO with the spherical hamonic coefficients up to 2190 is the most suitable model can be use for combination with terrectrial gravity for establised unified gravity data base corveringover sea of Vietnam.