Gravity Anomalies with Resolution of 1.5′×1.5′Over China Sea and Its Vicinity Derived from Multi-Satellite Altimeter

On the basis of gravity field model(EIGEN_CG01C),together with multi-altimeter data,the improved gravity anomalies gridded in 1.5′×1.5′ in China sea and vicinity are determined using the weighted method of along-track least squares and inverse Vening-Meinesz formula.Compared with the shipboard gravimetry in South China Sea;the results show that the accuracy of the gravity anomalies computed with the altimeter data is 3.37×10-5 m·s-2.