西太平洋海域卫星测高重力垂直梯度分布

Distribution of Vertical Graident of Altimetry Gravity in the Western Pacific

从地球重力场基本理论出发,推导了重力垂直梯度计算的数值积分公式,并利用由多颗测高卫星联合反演的2′×2′海洋重力异常资料,解算了西太平洋海域重力垂直梯度。将计算所得的重力异常垂直梯度与现有资料进行比较,其差值均方根为±10.08E,表明两者精度相当。此外,还对差值大小和空间分布进行了深入分析。

Based on the fundamental principle of earth gravity field, we derive the numerical integral expression for computing vertical gradient of gravity. According to new generation of 2′× 2′ satellite altimetry gravity anomaly data, the authors obtain the distribution of vertical gradient of altimetry gravity in the western Pacific area. The RMS of new vertical gradient of gravity is about ±10.08E, compared with GSFC00_DGZ data. In addition, some analyses and discussions were introduced. Finally, some possible approaches for further research are brought forward.