On the basis of the high-precision global gravity model ( EGM2008 ) , combined with multi-altimeter data( Geosat/GM data,ERS-1/168 data and Envisat data) ,the gravity anomalies grided in 2' ×2' over China sea and its vicinity (0°N ~42°N,102°E ~ 138°E) are determined with the method of deflection of the vertical and inverse Vening Meinesz formula. Compared with the shipboard gravimetry over the South China sea, the results show that the standard error of the gravity anomalies computed with the altimeter data is ±9.43 × 10 -5ms-2. To remove gross error of the residual deflection of the vertical by selecting different criterias, the gravity anomalies computed with the altimeter data and shipboard gravity anomalies were compared and analyzed, the accuracy of residual deflection in the vertical range of 3" ~ 5" is better.%联合Geosat/GM、ERS-1/168和Envisat 3种测高数据,基于高精度地球重力模型EGM2008,采用垂线偏差方法和逆Vening-Meinesz公式,利用移去-恢复技术确定了中国近海及邻近海域(0°N～42°N,102°E～138°E)分辨率为2′×2′的重力异常.在中国南海海域,测高重力异常与船测重力异常比较的标准差为±9.43×10-5ms-2.选取不同的判定准则,对残差垂线偏差进行粗差剔除后将计算的测高重力异常结果与船测重力资料进行比较分析,得出选用残差垂线偏差分量范围为3″～5”时精度较好.
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