卫星测高反演重力场在西太平洋海域的应用  

Application of Gravity Inversion From Satellite Altimeter Data in the West Pacific

作　　者：孙杨[1] 姜效典[1] 王燚[2] 李朝阳[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]中国海洋大学计算机基础部,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2017年第6期87-94,共8页Periodical of Ocean University of China

基　　金：海洋公益性行业科研专项(201305029-02)资助~~

摘　　要：利用高精度卫星测高数据反演重力是获取海洋重力异常的重要方法。本文介绍了自2008年以来新一代高精度测高卫星的相关信息。在此基础上,联合多颗新型卫星,进行交叉点平差,通过中心差分代替常规Sandwell方法计算垂线偏差,利用改进的逆Vening-Meinesz法和Stokes数值反解法对西太平洋某区域进行了重力场反演。反演结果与NGDC提供的船测重力值比较表明,逆Vening-Meinesz法计算误差小于Stokes数值反解法。通过添加随机噪声数值实验,进一步证明逆Vening-Meinesz法对于测高数据误差的抗差能力更强,在研究区的重力异常计算结果可信度较高。The application of gravity anomaly inversion from high quality satellite altimeter data is an im- portant method to acquire marine gravity. The main characteristics of newly available satellite altimeter data since 2008 are reviewed in this paper. On the basis of multi-satellite data, we apply crossover adjust- ment and use central difference method to calculate deflection of the vertical instead of conventional Sand- well method. After that, improved inverse Vening-Meinesz method and numerical inverse-Stokes approach are adopted to calculate the gravity filed of certain area in the West Pacific. Comparision with the ship- board-based gravity provided by NGDC shows that inverse Vening-Meinesz method has smaller errors than numerical inverse-Stokes approach. With further numerical expericment o/adding stochastic noise, we show that inverse Vening-Meinesz method is more robust so that it can provide reliable gravity estimation for the target area.

关 键 词：测高卫星 海洋重力 逆Vening-Meinesz 垂线偏差 

分 类 号：P312.1[天文地球—固体地球物理学]